PhD, Graduate School of Arts and Sciences, the University of Tokyo, Sep. 2015

Global History

History of Cross-Cultural Exchange

History of Central Eurasia

History of Sciences

History of the Mongol Empire

Environmental History

Humanities & Social Sciences, Sociology of science, history of science and technology, Scientific Exchange in the Period of the Mongol Empire

Master's degree program, Graduate School of Humanities and Human Sciences

Doctoral (PhD) degree program, Graduate School of Humanities and Human Sciences

‘Converting’ Knowledge, Culture and Themselves: Mongol Imperial Rule in Thirteenth- and Fourteenth-Century Eurasia
Yoichi Isahaya
Inner Asia, 26, 2, 279, 301, Brill, 07 Nov. 2024, [Peer-reviewed], [Invited], [Lead author]
English, Scientific journal, In this paper, I propose a new model of how the Mongol empire connected the various systems used by the subject peoples under their control. I contrast this to modern empires, which used a system of direct standardisation, so that one calendar, one currency, one system of measures, one way of doing history, often even one language (at least for most public purposes) and so on, was imposed on the entire empire. In the Mongol Empire, while a single system was not imposed, new methods of ‘conversion’ – or perhaps we could say ‘conversion formulae’ – appeared, by which disparate cultural practices of the conquered peoples were maintained, but rendered easily ‘convertible’ to each other, using tables and cognate methods. I discus this ‘conversion’ empire – as opposed to the modern ‘integration’ empire – in the fields of the calendar, language, money and historiography., 46970215;42712287;39604475;31383080

「14世紀の危機」の語り方——ヨーロッパ到来以前の黒死病
諫早庸一
思想, 1200, 9, 32, 岩波書店, 26 Mar. 2024, [Lead author], [Domestic magazines]
Japanese, Scientific journal, 42712287;39604475;33790826;32428242;44372706;24540777

Marāgha Ceased to Function: The Ṭūsī Family’s Intellectual Network and Īl-Khānid Political Itinerance
Yoichi Isahaya
Crossroads: An Interdisciplinary Journal of Asian Interactions, 22, 1-2, 5, 25, Brill, 20 Nov. 2023, [Peer-reviewed], [Lead author]
English, Scientific journal, Abstract

While there is no consensus as to when the Marāgha observatory, centre of a Eurasian-scale intellectual network, ceased to function, given that no historical sources mention such a date, by focusing more on the Īl-Khānid political context than on the scientific activities at the observatory that have so far attracted scholarly attention, I argue that the termination of the observatory’s activity overlapped with the downfall of Aṣīl al-Dīn b. Naṣīr al-Dīn (d. ca. 1317) in 1309/10. Naṣīr al-Dīn al-Ṭūsī (1201–1274) acquired the office of trustee of the waqf endowments for the observatory. This office was inherited after his death by his sons. However, the family property related to the religious endowments was targeted, which resulted in the family’s fall. Thereafter, the eighth īl-khān, Öljeitü (r.1304–1316), did not station his mobile court in Marāgha, which marked a shift of the intellectual centre of the Īl-Khānid dynasty away from the observatory., 42712287;32428242;24540777

The “Imperial Itinerance” in the Ulus of Jochi
Yoichi ISAHAYA
Slavic Studies, 70, 105, 134, Slavic-Eurasian Research Center, Hokkaido University, Sep. 2023, [Peer-reviewed], [Lead author], [Domestic magazines]
Japanese, Scientific journal, The nomadic empires—which culminated in the Mongol Empire (1206–1368) in terms of scale—are characterized by high mobility in the sense of constant movement of the power center. In common with most of the khans of the Mongol Empire, the khans of the Ulus of Jochi (Golden Horde) were itinerant monarchs who made seasonal movements especially between winter and summer quarters. Recent scholarly insights have differentiated “imperial itinerance”—whether it be the period of the united empire or later—from “mobile pastoralism” on the grounds that the former was certainly freed from exclusive dependence on the pastoral economy. In the case of Jochid khans, however, a paucity of sources allows us only to glimpse the itineraries of earlier khans like Batu (r. 1227–56) and Berke (r. 1257–66) according to which they engaged in north-south movements along the Lower Volga down to Sarāy in winter and up to Ügek or further to Bulghār in summer. Such seasonal rounds have been deduced from the reports of Latin visitors such as Carpini (ca. 1182–1252), Rubrouck (1215–ca. 65), and Marco Polo (1254–1324) with Arabic geographical description by Abū al-Fidāʾ (1273–1332) and al-ʿUmarī (1301–49). These premises form a research question as to whether, or not, the itineraries of the Jochid khans were fixed along with the Lower Volga without any variety that was well found in cases of other khans’ “imperial itinerance” mainly due to political reasons.
To address a variety of itineraries, the travelogue of Ibn Baṭṭūṭa (1304–68 or 77) is worthy of attention. After landing on the Crimea across the Black Sea, he visited the horde of Özbek (r. 1313–41) located near Mājar, a city along the Kuma River in Northern Caucasus in May 1332, ’33, or ’34. As far as extant sources are concerned, Özbek seems not to have been in military operation at that time; rather, Ibn Baṭṭūṭa’s description of the horde shows certain parallels with that of Rubrouck who depicted Batu’s mobile court on his seasonal round. These circumstances enable me to propose the hypothesis that later Jochid khans might have engaged in Volga-Caucasian latitudinal movement as a part of their seasonal rounds with longitudinal movement along the Lower Volga.
The aforementioned Latin visitors, who inform us of the itineraries of earlier Jochid khans, did not at all refer to Mājar. Such lack of mention is attributed to the fact that, in the middle of the thirteenth century, mountainous peoples of Caucasus such as the Lezgins fiercely resisted the Mongol rule of this region, which did not ensure the safety of roads, let alone that of khans’ seasonal rounds in Caucasus. However, geopolitical transformation since the reign of Möngke-Temür (1266/67–82) centered Caucasus in Jochid military, diplomatic, and commercial strategies. This transformation came with the rise of Black Sea trade that brought prosperity to cities along commercial roads between the Black Sea and the Caspian Sea. In the reign of Toqto’a (1291–1312) who exerted more direct control over the northerly shores of the two seas, the political situation in Caucasus settled as trade routes were established through the region, which restyled Mājar into a thriving commercial center. The city also commanded a strategic position as a point almost midway between Azov and Derbend, the Iron Gate. Toqto’a must have benefited from the location of Mājar to conduct military operations both to Caffa and Azerbaijan. These facts lead me to conclude that later Jochid khans such as Toqto’a, Özbek, and Janibek (r. 1341–57) had an alternative option, which passed through Northern Caucasus, to that along the Volga in their seasonal rounds. The geopolitical transformation necessitated varying their “imperial itinerance” as in the cases of the other Mongol uluses., 32428242;24540777

기후변화가 제국을 흔들었을까? 1270~80년대 몽골 사례 연구/Did the Climate Change Shake the Empire? The Case of the Mongols in the 1270s and '80s
Yoichi Isahaya
생태환경과 역사/Journal of Ecological and Environmental History, 10, 5, 40, The Society for Ecological and Environmental History, Jun. 2023, [Peer-reviewed], [Invited], [Lead author], [International Magazine]
English, Scientific journal, This paper is to consider the history of the Mongol empire (1206–1368) in the context of the socio-climatic transition from the Medieval Climate Anomaly (ca. 800–ca. 1260) to the Little Ice Age (ca. 1550–ca. 1910). After consolidating tribal powers in Mongolia, Chinggis (r. 1206–27) succeeded in a series of military expeditions to Northern China, the Gansu Corridor and Central Asia under a favorable climatic condition called the 15-year Mongol Pluvial (1211–25). By the time of the death of Möngke (r. 1251–59), the empire ruled over almost all of the steppes in Central Eurasia. No more vast steppes existed next to the imperial territories. Such environmental conditions acted as barriers against the further Mongol invasion except for South China, where the Mongols overcame the ecological difficulty by means of the Han navies. Since the fall of the Southern Song in 1279, the empire stopped its expansion, which was followed by the dissolution of the united empire into the four regional khanates/uluses. This paper attempts to calibrate the impact of climate change, which became tangible in Eurasian scale especially from 1270s, as well as the abovementioned topographical constraints. In the Ilkhan Empire. (1256–1357) in Iran, the period from the death of Abaqa (r. 1265–82) to the coronation of Ghazan (r. 1295–1304) is marked with instability. The Khanate of the Golden Horde (ca. 1240–after 1359) in Russia was also in the political disturbance after the reign of Möngke-Temür (1266/67–ca. 82) to the time when Toqta (r. 1291–1312) ascended the throne. In the case of the Yuan dynasty in China, Qubilai’s reign (r. 1260–94) suffered a remarkable setback with timing of the death of the empress Čabui (d. 1281), while Qaidu (r. 1271–1301)—Qubilai’s formidable adversary—reached the height of his power in 1280s–90s in Central Asia. This paper is to shed a new light on the history of the Mongol empire by focusing on 1270s to 80s from the standpoint of Eurasian-scale climate change., 39604475;32428242

The "Crisis" of the Fourteenth Century in a Eurasian Context
Yoichi ISAHAYA
Shi'en: The Journal of Historical Studies, 82, 2, 185, 211, The Historical Society of Rikkyo University, 30 Mar. 2022, [Lead author], [Domestic magazines]
Japanese, Scientific journal, This review essay seeks to provide a general overview of studies on the “crisis” of the fourteenth century that cohered with a triple peril of climatic downturn, political upheaval and continental pandemic in the time of transition from the Medieval Climate Anomaly (MCA) to the Little Ice Age (LIA). While the term of the “crisis” of the fourteenth century was originally embedded in the discourse of the European history, the recent sophistication of paleoclimatology enables us to reappraise the “crisis” in a wider context, for example, together with considering the “thirteenth-century world system” by Janet Abu-Lughod. Bruce Campbell, in the context of the shift from MCA to LIA, achieved a synthesis of economic and climate data with the term of the Great Transition which spanned around 1270s to 1470s as profound and irreversible changes in both of the Eurasian environmental and human conditions. Campbell’s great synthesis, however, would not totally emancipate the “crisis” from the Eurocentric historical narrative in comparison with the recent growth of the environmental history of Central Eurasia. As a representative, Nicola Di Cosmo sheds light upon the nuanced relationship of the nomadic empires with the grassland environment with temporal and spatial variety, whose scope extends to the Mongol empire (1206–1368). The rise and fall of this landmass polity in Eurasia occurred in process of the socio-ecological changes from MCA to LIA, which should be more taken into consideration of the Great Transition. The climate change might have taken form of a fatal blow in combination with the Black Death, of which Monica Green renews our understanding by means of the recent development of paleogenetics. Her core argument is posed in that the fourteenth century plague outbreaks were seeded by a series of Mongols’ military campaigns of the thirteenth century, in which several sieges greatly contributed to the plague dispersion. This “siege paradigm” requires us to pay more attention toward the thirteenth-century basis underlaying the next-century “crisis.” These strands of interdisciplinary approach to the “crisis” open a new horizon for the history of Eurasia., 33790826;32428242

From Alamut to Dadu: Jamāl al-Dīn’s Armillary Sphere on the Mongol Silk Roads
Isahaya Yoichi
Acta Orientalia Academiae Scientiarum Hungaricae, 74, 1, 65, 78, Akademiai Kiado Zrt., Mar. 2021, [Peer-reviewed], [Invited], [Lead author]
English, Scientific journal, This article aims to shed light on a hitherto unknown transmission route of the astral sciences from Alamut to Dadu (Beijing). I argue that the huntianyi 渾天儀, an armillary sphere, which Jamāl al-Dīn dedicated to Qubilai in 1267, was designed in Alamut – the main stronghold of the Nizārī Ismāʿīlīs – on the grounds that the instrument was set to Alamut’s latitude. After its fall in 1256, the armillary sphere traversed the Mongol Silk Roads. The Dastūr al-munajjimīn, an Arabic work of the Nizārī Ismāʿīlīs, functions as the missing link in this West-to-East transmission., 24540777

Mongol Eurasia from the View of Astral Sciences: Naṣīr al-Dīn al-Ṭūsī (1201–1274) as a Cultural Piviot
Yoichi ISAHAYA
Shi'en, 79, 2, 88, 114, May 2019, [Invited], [Lead author]
Japanese, Scientific journal

Naṣīr al-Dīn al-Ṭūsī’s Comments on Euclid’s Data
Nathan SIDOLI; Yoichi ISAHAYA
Historia Mathematica, 47, 87, 105, Apr. 2019, [Peer-reviewed], [Invited]
English, Scientific journal

Reconstructing the Chinese-Hijri Calendar Conversion Table in the Ilkhanid Astronomical Handbook: Reconsidering the Inter-Dynastic Exchange of Astral Sciences in Mongol Eurasia
Takashi SUGA; Yoichi ISAHAYA
The Proceedings of the 5th Symposium on Astronomical Historical Records and Modern Science, 252, 277, Jan. 2019
Japanese, International conference proceedings

Persian Transcription of Yuan Chinese in the History of China of the Jami' al-Tawarikh (Ms. Istanbul, Topkapi Sarayi, Hazine 1654)
Isahaya Yoichi; Endo Mitsuaki
The Economic Review, 9, 123, 161, 青山学院大学経済研究所, Mar. 2017, [Lead author]
English, Research institution

Entangled Representation of Heaven: A Chinese Divination Text from a Tenth-Century Dunhuang Fragment (P. 4071)
Yoichi ISAHAYA; Jyuh Fuh LIN
Historia Scientiarum, 26, 3, 153, 171, Mar. 2017, [Peer-reviewed], [Lead author]
English, Scientific journal

Yuan Phonology as Reflected in Persian Transcription in the Zij-i Ilkhani
Endo Mitsuaki; Isahaya Yoichi
The Economic Review, 8, 1, 38, 青山学院大学経済研究所, Mar. 2016
English, Research institution

History of Science and Global History : Challenges for Trans-Border History
ISAHAYA Yoichi
Journal of history of science, Japan. [Series III], 269, 99, 105, 日本科学史学会, Apr. 2014, [Peer-reviewed], [Lead author]
Japanese, Scientific journal

The Tarikh-i Qita in the Zij-i Ilkhani : The Chinese calendar in Persian
ISAHAYA Yoichi
SCIAMVS : sources and commentaries in exact sciences, 14, 149, 258, SCIAMVS, Dec. 2013, [Peer-reviewed], [Lead author]
English, Scientific journal

History and Provenance of the ‘Chinese’ Calendar in the Zīj-i Īlkhānī
Yoichi ISAHAYA
Tarikh-e Elm: Iranian Journal for the History of Science, 8, 19, 44, Dec. 2010, [Peer-reviewed], [Lead author]
English, Scientific journal

The modification of the twelve-animal cycle in the cultural sphere of literary Persian: a consideration of the twelve-animal cycle of the Timurid period
諫早 庸一
The Journal of history, 91, 3, 496, 527, 史学研究会, May 2008, [Peer-reviewed], [Lead author]
Japanese, Scientific journal

Survival Strategies International Workshop Report: Radius of Power in Premodern High Eurasia
Yoichi Isahaya, Slavic-Eurasian Research Center News, 30, 9, 12, Mar. 2026, [International Magazine]
Slavic-Eurasian Research Center, Hokkaido University, English, Report research institution, 50511692;46970215;42712287;49336417

ライプニッツ東欧歴史文化研究所滞在記
諫早 庸一, スラブ･ユーラシア研究センターニュース, 178, 26, 29, 27 Feb. 2026, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution, 49954538;49336417

読書アンケート 2025——識者が選んだ、この一年の本
諫早 庸一, 読書アンケート 2025——識者が選んだ、この一年の本, 46, 47, 16 Feb. 2026, [Invited], [International Magazine]
みすず書房, Japanese, Introduction commerce magazine

Introduction: Dialogue with Favereau’s The Horde
Yoichi Isahaya, Acta Slavica Iaponica, 46, 2, 165, 167, Dec. 2025, [International Magazine]
Slavic-Eurasian Research Center, Hokkaido University, English, Report scientific journal, 49954538;39604475;49336417

SRCセミナー「文理協働シリーズ：古銭学編」報告記
諫早 庸一, スラブ･ユーラシア研究センターニュース, 177, 10, 13, Oct. 2025, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution, 49954538;49336417

生存戦略研究国際ワークショップ「ユーラシア高緯度帯における権力の半径 (Radius of Power in Premodern High Eurasia) 」報告記
諫早 庸一, スラブ･ユーラシア研究センターニュース, 176, 8, 12, 31 Jul. 2025, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Others, 50511692;46970215;42712287;49336417

科研研究会「『14 世紀の危機』についての文理協働研究」報告記
諫早庸一, スラブ･ユーラシア研究センターニュース, 175, 28, 32, 08 May 2025, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Meeting report, 32428242

書評: 向正樹『クビライと南の海域世界』大阪大学出版会, 2024年
諫早 庸一, 内陸アジア史研究, 40, 33, 47, Mar. 2025, [Peer-reviewed], [Invited]
内陸アジア史学会, Japanese, Book review, 49954538;42712287;49336417;50511692

読書アンケート 2024――識者が選んだ、この一年の本
諫早 庸一, 4, 5, 17 Feb. 2025, [Invited], [International Magazine]
みすず書房, Japanese, Book review

2024 年度公開講座「シルクロード：交差する時間・空間・ディシプリン」開催される
諫早 庸一, スラブ･ユーラシア研究センターニュース, 174, 13, 15, 12 Feb. 2025, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Meeting report, 32428242

Book Review: Peter Jackson, From Genghis Khan to Tamerlane: The Reawakening of Mongol Asia
Yoichi Isahaya, Hokudai-Shigaku, 64, 112, 120, 04 Dec. 2024, [Peer-reviewed], [Domestic magazines]
HIstorical Association of Hokkaido University, Japanese, Book review, 32428242

総合地球環境学研究所国際ワークショップ参加報告記
ルスラン・シャクマトフ; 諫早 庸一, スラブ･ユーラシア研究センターニュース, 172, 41, 45, 31 Jul. 2024, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Meeting report, 39604475

Report on 2023 Summer International Symposium: “The Phase of Catastrophe? The Crisis of the 14th Century in Afro-Eurasian Context”
諫早庸一, Slavic-Eurasian Research Center News, 172, 46, 49, 31 Jul. 2024, [Domestic magazines]
Slavic-Eurasian Research Center, Japanese, Report research institution, 32428242

特集にあたって——空白、辺境、そして地下から
諫早庸一, 思想, 1200, 6, 8, 26 Mar. 2024, [Domestic magazines]
岩波書店, Japanese, Introduction scientific journal, 32428242;39604475;42712287;33790826;24540777

ニーダム・クエスチョンへの回帰（書評: オブライエン『「大分岐論争」とは何か——中国とヨーロッパの比較』）
諫早庸一, 図書新聞, 3632, 3, 23 Mar. 2024, [Domestic magazines]
武久出版, Japanese, Introduction commerce magazine

Report on 2023 Summer International Symposium: “The Phase of Catastrophe? The Crisis of the 14th Century in Afro-Eurasian Context”
Yoichi Isahaya, Slavic-Eurasian Research Center News, 28, 1, 4, Mar. 2024
Slavic-Eurasian Research Center, English, Meeting report, 32428242;39604475

博士研究員のシャクマトフ・ルスランさんが第9回北大・部局横断シンポジウムでベストポスター賞を受賞
諫早庸一, スラブ･ユーラシア研究センターニュース, 170, 20, 28 Dec. 2023, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Others, 39604475;32428242

附置研・センター会議第 3 部会シンポジウム開催報告
諫早庸一, スラブ･ユーラシア研究センターニュース, 170, 7, 9, 28 Dec. 2023, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Meeting report, 32428242

「14 世紀の危機」の語り方——2023 年度夏期国際シンポジウム ≪崩壊の局面——アフロ・ユーラシアから「14 世紀の危機」を思考する≫ 報告記
諫早庸一, スラブ･ユーラシア研究センターニュース, 169, 1, 5, 15 Sep. 2023, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Meeting report, 32428242;39604475

2023年度夏期国際シンポジウム≪崩壊の局面：アフロ・ユーラシアから「14世紀の危機」を思考する≫開催予告
諫早庸一, スラブ･ユーラシア研究センターニュース, 168, 1, 4, 06 Jun. 2023, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution, 32428242;39604475

北海道でユーラシア史を考える
ディビッド・ムーン; 諫早庸一, スラブ･ユーラシア研究センターニュース, 167, 16, 19, 09 Feb. 2023
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution

Review: Sakurai et al. The History of Yuan Dynasty. Bensei Shuppan, 2021
Yoichi Isahaya, 北大史学, 62, 48, 56, 22 Dec. 2022, [Peer-reviewed]
北大史学会, Japanese, Book review, 32428242;33790826;24540777;39604475

書評会「中塚武『気候適応の日本史』を読む」報告記
諫早庸一, スラブ･ユーラシア研究センターニュース, 165, 13, 16, 25 Jul. 2022, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese

「人文学のための古代 DNA セミナー」報告記
諫早庸一, スラブ･ユーラシア研究センターニュース, 164, 26, 29, Mar. 2022
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution, 33790826;32428242

IMC 2021参加記——プライザー＝カペラー氏の基調講演を中心に
諫早庸一, スラブ･ユーラシア研究センターニュース, 163, 23, 25, Nov. 2021, [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Others, 32428242

書評: 岡田英弘『漢字とは何か——日本とモンゴルから見る』
諫早 庸一, 産経新聞, 日刊28261, 20, 26 Sep. 2021, [Invited]
産業経済新聞社, Japanese, Book review

Review: Sholeh Quinn, Persian Historiography across Empires: The Ottomans, Safavids, and Mughals (Cambridge: Cambridge University Press, 2021)
Yoichi ISAHAYA, JACAS Bulletin, 17, 47, 54, 31 Jul. 2021, [Peer-reviewed], [Domestic magazines]
The Japan Association for Central Asian Studies, Japanese, Book review

書評: ヴァレリー・ハンセン『西暦一〇〇〇年——グローバリゼーションの誕生』
諫早 庸一, 日本経済新聞, 30, 26 Jun. 2021, [Invited], [Domestic magazines]
西暦1000年とは、グローバリゼーションがその始まりを告げた年だった。この時代に、世界中を網羅する交易路が形成される。この本はそう書き起こされている。「グローバリゼーションの誕生」と言えば、16世紀ヨーロッパ主導による世界経済の成立が想起されるであろう。しかし、それよりもはるかに早い西暦1000年に、新大陸をも包括した本当の意味での〈世界〉の一体化を語る本書は、類書の無い挑戦だと言える。, 日本経済新聞社, Japanese, Book review

集中講義「古気候データは歴史研究にどう活用できるか: 文理協働の実現に向けて」
諫早 庸一, スラブ･ユーラシア研究センターニュース, 162, 21, 24, Jun. 2021
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution

書評: 足立孝『辺境の生成――征服＝入植運動・封建制・商業――』名古屋大学出版会, 2019年
諫早 庸一, 北大史学, 60, 47, 54, Dec. 2020, [Peer-reviewed], [Lead author]
北大史学会, Japanese, Book review

環境と社会のあいだ——ワークショップ「前近代ユー ラシア東西における気候変動と社会」報告記——
諫早 庸一, スラブ･ユーラシア研究センターニュース, 161, 8, 11, Nov. 2020, [Lead author]
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution

北海道中央ユーラシア研究会１月例会
諫早 庸一, スラブ･ユーラシア研究センターニュース, 159, 15, 20, Apr. 2020, [Lead author], [Domestic magazines]
北海道大学スラブ・ユーラシア研究センター, Japanese, Report research institution

Another "Astronomical Dialogue": The Encounter of Two Astral Sciences in Mongol Eurasia
諫早庸一, なじまぁ——Accessible Asia——, 10, 22, 22, Mar. 2020, [Invited], [Lead author]
立教大学アジア地域研究所, Japanese, Introduction research institution

Global Middle Ages from Vienna: A Series of Lectures by Johannes Preiser-Kapeller
Minoru OZAWA; Yoichi ISAHAYA, Shi'en: The Journal of Historical Studies, Rikkyo University, 80, 2, 114, 134, Mar. 2020, [Invited], [Last author]
Japanese, Report research institution

SRC Special Lecture, “New Rome in a Larger World,” by Dr. Preiser-Kapeller
Yoichi ISAHAYA, Slavic-Eurasian Research Center News, 26, 6, 10, Dec. 2019, [Lead author]
English, Report research institution, 13396343

「14 世紀の危機」ワークショップから考える文理協働
諫早 庸一; 原田央, スラブ･ユーラシア研究センターニュース, 158, 12, 18, Nov. 2019, [Last author]
Japanese, Report research institution, 13396343

M.E.S.S. 2019 “Religions in Mongol Eurasia” 参加記
諫早 庸一, スラブ･ユーラシア研究センターニュース, 157, 22, 25, Jul. 2019, [Lead author]
Japanese, Report research institution, 24540777

Book Review: Miya Noriko, "Knowledge" in East and West during the Mongol Period
Yoichi ISAHAYA, Shi'en, 79, 2, 224, 243, May 2019
Japanese, Book review

Dialogue concerning Two Astral Sciences: Naṣīr al-Dīn al-Ṭūsī, a Sage of Cathay, and Their Chinese Calendar in the Zīj-i Īlkhānī (c. 1272 AD) (in Japanese) (Doctoral Theses in Middle East Studies)
Yoichi ISAHAYA, Annals of Japan Association for Middle East Studies, 32, 1, 149, 155, 15 Jul. 2016
English, Others

Review: Stephen Blake, Time in Early Modern Islam: Calendar, Ceremony, and Chronology in the Safavid, Mughal and Ottoman Empires
Yoichi ISAHAYA, Nazariyat: Journal for the History of Islamic Philosophy and Sciences, 3, 2, 199, 203, Nov. 2015, [Peer-reviewed], [Invited]
English, Book review

文明の比較から境界の学へ――13世紀北西イランにおける数学・天文学テクストから「他者理解」に迫る
諫早庸一, Gateway to Asian Studies in Japan, 14 Oct. 2015, [Invited]
人間はこれまで、文化的背景の異なる「他者」やその思考をいかに理解してきたのか。13世紀モンゴル帝国治下の北西イランで学術の中心地となったマラーガ天文台に集った学者たちの「幾何学で宇宙を表現する」という志向から、他者理解のありようを読み解く。, 東京大学東洋文化研究所, Japanese, Technical report

SHIMO Hirotoshi, The Political Structure of the Mongol Empire
ISAHAYA Yoichi, INNER ASIAN STUDIES, 29, 135, 145, 2014, [Peer-reviewed]
内陸アジア史学会, Japanese, Book review

Climate Changes, Plagues and Wars: The Crisis of the Fourteenth Century in the Afro-Eurasian Context
Nicola Di Cosmo; Yoichi Isahaya
Edinburgh University Press, Dec. 2026, 1399554123, 288, English, Scholarly book, The Crisis of the Fourteenth Century has been regarded as a turning-point in world history, but it has typically only been approached from a European perspective. This volume expands that view by focusing on Asia and the Middle East (Afro-Eurasia) and by including environmental approaches that recognise the shifts in the Eurasian socio-ecological regime from the Medieval Climate Anomaly to the Little Ice Age. It therefore positions this period of history within three interrelated contexts – climate change, political upheaval outside Europe and a transcontinental pandemic – making historical connections typically not considered in studies of the Crisis.

Bringing together thus-far neglected topics and case studies, and based on new sources and palaeo-scientific data, this book analyses the Crisis through an interdisciplinary lens. This intersection of climatology, environmental studies and history adds a long-awaited global dimension to the existing scholarship., 49954538;49336417;32428242, [Peer-reviewed], [Joint editor]

A Cultural History of Higher Learning, vol. 2, A Cultural History of Higher Learning in the Medieval Age
Yoichi Isahaya, Cultures
Bloomsbury USA Academic, 30 Oct. 2025, 1350232203, 15–33, English, Scholarly book, 49954538;50511692;46970215;49336417, [Contributor]

The Mongol Empire in the History of Eurasia
Yoichi Isahaya
Misuzu Shobô, 10 Oct. 2025, 4622095688, 464, Japanese, In the thirteenth century, under Chinggisid rule, the Mongol empire (1206–1368) swept across the vast expanse of Eurasia. From present-day China to Central Asia, Russia, and Iran, it absorbed a remarkable diversity of peoples, languages, and religions, forging the largest contiguous land empire in human history. What, then, was the true character of this unprecedented polity?

This book explores the many faces of the Mongol world through a comparative reading of the Rashīd al-Dīn’s Compendium of Chronicles and Marco Polo’s Description of the World, focusing on their depictions of “China.” It follows the threads of intellectual exchange that connected Iran and China through “astronomical dialogue,” the circulation of knowledge, and even paleoclimatic evidence that reveals new insights into the spread of the Black Death.

Drawing on a wide range of archives—of society, nature and biology—it traces the Mongol empire’s evolution from unification to its dissolution into the four uluses and ultimate decline, through the dual perspectives of mobility and environment.

Engaging in a truly “multiperspectival” mode of inquiry, this work opens new horizons for global history and offers a fresh vision of the Mongol empire as a world shaped by movement and conversion., 49954538;49336417;33790826;32428242, [Single work]

星の文化史: 世界 13 地域における星の知識・伝承・信仰
後藤 明, モンゴル
丸善出版, 03 Feb. 2025, 4621310607, 256, 162–169, Japanese, 46970215, [Contributor]

西洋中世文化事典
西洋中世学会, 気候変動
丸善出版, 03 Dec. 2024, 4621310194, 736, 4–5, Japanese, Dictionary or encycropedia, [Contributor]

現代思想 2024年11月臨時増刊号 現代思想＋ わたしの留学記
蘆田裕史; 阿部海太郎; 阿部賢一; 五十嵐ジャンヌ; 池田嘉郎; 諫早庸一; 石岡丈昇; 鵜飼哲; 小川絵梨子; 笠井叡; 加治屋健司; 加藤賢; 川添愛; 貴戸理恵; 木下千花; 桑木野幸司; 小磯洋光; 斎藤幸平; 三遊亭好青年; 塩田千春, とぶ砂の国へ――問われることなく、問うことのできた時間
青土社, 09 Oct. 2024, 4791714733, 168, 168–173, Japanese, General book, [Contributor]

中央ユーラシア文化事典
小松 久男; 梅村, 坦; 坂井, 弘紀; 林, 俊雄; 前田, 弘毅; 松田, 孝一, ウルグ・ベク——天文君主の虚像と実像
丸善出版, 04 Jul. 2023, 4621308068, 814, 182–183, Japanese, Dictionary or encycropedia, ［Internationally co-authored］, [Contributor]

モンゴル帝国と海域世界 12~14世紀 (岩波講座 世界歴史 10巻)
諫早庸一, モンゴル帝国時代の天文学
岩波書店, 01 May 2023, 4000114204, 328, 209–210, Japanese, Scholarly book, [Contributor]

『つなぐ世界史』1 古代・中世
諫早庸一, モンゴルの世界帝国; マルコ・ポーロとラシード・アッディーン
清水書院, 17 Apr. 2023, 4389226010, 248, 166–169; 188–193, Japanese, [Contributor]

グローバル文化史の試み (中央大学学術シンポジウム研究叢書)
諫早庸一, グローバルに文化を問うこと——作図についてモンゴル帝国期東西天文学交流を例に
中央大学出版部, 14 Apr. 2023, 4805761938, 278, 37–70, Japanese, Scholarly book, [Contributor]

Routledge Handbook on the Sciences in Islamicate Societies: Practices from the 2nd/8th to the 13th/19th Centuries
Sonja Brentjes, Islamicate Astral Sciences in Eastern Eurasia During the Mongol-Yuan Dynasty (1271–1368)
Routledge, 24 Jan. 2023, 1138047597, 838, 688–695, English, Scholarly book, 33790826;24540777, [Peer-reviewed], [Contributor]

ユリイカ 2023年1月号 特集＝コペルニクス ―『天球の回転について』から『チ。ー地球の運動についてー』へ―
魚豊; アダム・タカハシ; 池内了; 瀬戸一夫; 中西恭子, イスラーム経由コペルニクス行き——ユダヤ教徒がつなぐ同心球天文学の道
青土社, 27 Dec. 2022, 4791704258, 238, 224–232, Japanese, 33790826;24540777, [Contributor]

現代思想2022年6月臨時増刊号 総特集◎ウクライナから問う ―歴史・政治・文化―
塩川伸明; 池田嘉郎; 浜由樹子; 酒井啓子; 白井聡; 沼野恭子; 福嶋亮大; 諫早庸一, キエフとモスクワのあいだ——前期代アフロ・ユーラシア史からの視界
青土社, 17 May 2022, 479171430X, 382, 262–270, Japanese, General book, [Contributor]

伝染病と歴史——第21回日韓・韓日歴史家会議報告書
日韓歴史家会議組織委員会, The “Great Transition” in the Eurasian Context: To Prof. Pak Heung Sik’s Paper
日韓文化交流基金, 15 Mar. 2022, 198, 71–78, Japanese, [Contributor]

Overlapping Cosmologies in Asia: Transcultural and Interdisciplinary Approaches (Crossroads - History of Interactions Across the Silk Routes, 4)
Mak, Bill M.; Huntington, Eric, Geometrizing Chinese Astronomy? The View from a Diagram in the Kashf al-ḥaqāʾiq by al-Nīsābūrī (d. ca. 1330)
Brill, 22 Feb. 2022, 9004511415, 297, 139–169, English, Scholarly book, This paper deals with a section of a Persian astronomical work entitled Kashf al-ḥaqāʾiq-i zīj-i īlkhānī (Uncovering the truths of the Zīj-i īlkhānī) by Niẓām al-Dīn al-Nīsābūrī (d. ca. 1330) that includes some unique and exceptionally early materials on a Ptolemaic interpretation of Chinese astronomy. This work is a commentary on the Zīj-i īlkhānī (Īlkhānid astronomical handbook) by Naṣīr al-Dīn al-Ṭūsī (1201–1274), the first Islamicate astronomical handbook (zīj) to make reference to a Chinese calendar. Although a certain resemblance has been noted between the zīj and the li (the Chinese astronomical system) in terms of content, a striking difference is apparent in their cosmologies. The former was based on the geometrical universe of western Eurasian astronomy, while the latter embodied the numerical cosmology of the eastern Eurasian tradition. In the Kashf al-ḥaqāʾiq, al-Nīsābūrī took a noteworthy approach to the Chinese calendar, especially in using a geometrical diagram to explain a numerical procedure in a section on the lunar anomaly. In other words, a fourteenth-century scholar in Iran interpreted one aspect of Chinese astronomy through Ptolemaic geometrical representation, of which Islamicate astronomers were masters. His diagram can be regarded as a nexus between the cosmologies of western and eastern Eurasia., 24540777, [Peer-reviewed], [Contributor]

論点・東洋史学:アジア・アフリカへの問い158
石川, 博樹; 太田, 淳; 太田, 信宏; 小笠原, 弘幸; 宮宅, 潔; 四日市, 康博; 吉沢, 誠一郎, 「モンゴルの覇権と危機――｢14世紀の危機」とは何か」、「科学の東西交流――天文学・医学はどのように相互交流したのか」
ミネルヴァ書房, 27 Dec. 2021, 4623092178, 378, 146–147, 150–151, Japanese, Textbook, [Peer-reviewed], [Contributor]

Along the Silk Roads in Mongol Eurasia: Generals, Merchants, and Intellectuals
Biran, Michal; Brack, Jonathan; Fiaschetti, Francesca, Fu Mengzhi: “The Sage of Cathay” in Mongol Iran and Astral Sciences along the Silk Roads
University of California Press, 28 Jul. 2020, 0520298756, 355, 238-254, English, Scholarly book, [Peer-reviewed], [Contributor]

現代思想 2020年5月号 緊急特集=感染/パンデミック ―新型コロナウイルスから考える―
G・アガンベン; S・ジジェク; J-L・ナンシー; 有薗真代; 飯島渉; 奥野克巳; 諫早庸一, 一三─一四世紀アフロ・ユーラシアにおけるペストの道
青土社, 28 Apr. 2020, 4791713974, 270, 137–144, Japanese, [Contributor]

Voices of Three Generations: Essays in Honor of Shnasr
Mohammad H. Faghfoory; Katherine O'Brien, The Mongol Impact on Astronomy: The Differentiation of Astronomy in the Eastern and Western Islamicate World
Kazi Pubns Inc, 01 Aug. 2019, 1567446779, 354, 333–349, English, Scholarly book, Cet article met en perspective le système héliocentrique copernicien avec les évolutions décisives qui ont précédé sa genèse dans le monde islamique. Au XIIIième et XIVième siècle, la mesure du temps par des méthodes astronomiques (‘ilm al-mīqāt) était bien développé dans sa partie occidentale tandis que l’astronomie théorique (‘ilm al-hay’a) l’était plus dans sa partie orientale. La domination mongole provoqua une « différenciation astronomique » dans le monde islamique : le rapprochement entre sciences religieuses et non-religieuses qui se produisit alors déboucha sur une série d’innovations astronomiques qui aboutirent au développement du modèle héliocentrique de type copernicien. Dans la partie occidentale du monde islamique, l’astronomie pratique fut intégrée au cursus des matières enseignées dans les madrasas, qui formaient les muwaqqits. Ces deux grandes orientations des sciences astronomiques se retrouvèrent en contact dans les territoires ottomans à partir du milieu du XVième, à l’époque où Copernic naquit., [Contributor]

Marco Polo and the Silk Road (10th–14th Centuries)
Rong Xinjiang; Dang, Baohai, Sino-Iranica in Pax Mongolica: The Elusive Participation of Syriac-Rite Christians in the Ilkhanid Translation Project
Peking University Press, 22 Jun. 2019, 7301303289, 2, 2, 2, 411p, 341–362, English, [Contributor]

Thābit ibn Qurra’s Restoration of Euclid’s Data: Text, Translation, Commentary (Sources and Studies in the History of Mathematics and Physical Sciences)
Sidoli, Nathan; Isahaya, Yoichi
Springer, 03 Sep. 2018, 3319946609, 379, English, Scholarly book, This book provides a critical edition, translation, and study of the version of Euclid’s treatise made by Thābit ibn Qurra, which is the earliest Arabic version that we have in its entirety. This monograph study examines the conceptual differences between the Greek and Arabic versions of the treatise, beginning with a discussion of the concept of "given" as it was developed by Greek mathematicians. This is followed by a short account of the various medieval versions of the text and a discussion of the manuscripts used in this volume. Finally, the Arabic text and an English translation are provided, followed by a critical commentary., ［Internationally co-authored］, [Peer-reviewed], [Joint work]

at plus 32 (co-edited by Hiromitsu Yoshikawa)
Hiromitsu Yoshikawa et; al; 岩沢 蘭, History in Future, Historians on Tomorrow: FromThe End of History to the Historiography of Inter-Subjectivity
Ota shuppan, 09 May 2017, 4778315766, 218, [Joint work]

The Oxford Handbook of THE HISTORY OF MATHEMATICS
斎藤 憲; 三浦 伸夫; 三宅 克哉, Siyaq: Numerical Notation and Numeracy in the Persianate World
Eleanor Robson; Jacqueline Stedall, Kyoritsu shuppan, May 2014, 4320110889, 878, 383-401, Japanese, [Joint translation]

Historical Atlas of the Islamic World
清水 和裕; 清水 和裕, Chapter 9 Islam in the East, Chapter 11 The Rise of the Ottoman Empire
David Nicolle; Kazuhiro Shimizu, Akashi Shoten, 07 Mar. 2014, 4750339628, 191, 134–147, 162–175, Japanese, Scholarly book, [Joint translation]

Translation, history and arts : new horizons in Asian interdisciplinary humanities research
Meng, Ji; Ukai, Atsuko, Gravity of Modernity: Reactions to the “New Astronomy” in Iran and Japan
Cambridge Scholars Publishing, 01 Sep. 2013, 1443849391, 199, 27–47, English, Scholarly book, [Contributor]

Secularization, Religion and the State
HANEDA Masashi, Vicissitudes of Nourūz: Islam, Zoroastrianism, and Historical Time Scales
UTCP, Dec. 2010, 63-74, English, Scholarly book, [Joint work]

Roads of Merchants, Roads of Warriors: Imperial Itinerance in the Golden Horde (13th–14th Centuries)
Yoichi Isahaya
Reconsidering Imperial Dynamics and Geographies of Power: Imperial Reach and Imperial Impact in Afro-Eurasia through the Ages, 05 May 2026, University of Innsbruck, English, Invited oral presentation
04 May 2026 - 07 May 2026, University of Innsbruck, 49336417, [Invited], [International presentation]

歴史学からみる黒死病研究の〈いま〉
諫早 庸一
SRCセミナー「文理協働シリーズ：古遺伝学編」, 13 Mar. 2026, 科学研究費基盤研究A 「気候変動・疫病・戦争：アフロ・ユーラシアからの「14世紀の危機」」, Japanese, Oral presentation
北海道大学スラブ・ユーラシア研究センター, Japan, 49954538;49336417, [Domestic Conference]

ライプニッツ東欧歴史文化研究所滞在記／My Stay at the Leibniz Institute for the History and Culture of Eastern Europe
諫早 庸一
北海道中央ユーラシア研究会 昼食懇談会, 17 Dec. 2025, 北海道中央ユーラシア研究会, Japanese, Public discourse
北海道大学スラブ・ユーラシア研究センター, Japan, 49336417;49954538

Irinjin, a Ruler in the Purgatorium: The Hülegüid Rule in Anatolia during the Period of the Dantean Anomaly (1315–22)
Yoichi Isahaya
Environmental Anomalies and Political Legitimacy in Global Eurasia (12th–14th Century), 10 Nov. 2025, University of Naples "L'Orientale", Japanese, Public symposium
10 Nov. 2025 - 11 Nov. 2025, University of Naples "L'Orientale", 49954538;50511692;51327983;39604475;49336417;42712287, [International presentation]

The Crisis of the Fourteenth Century in an Afro-Eurasian Context
Yoichi Isahaya
Wintersemester 2025/26 Kolloquium, “Kolloquium zur Geschichte des Mittelalters”, 06 Nov. 2025, Institut für Geschichte - Martin Luther University Halle-Wittenberg, Japanese, Public discourse
Martin Luther University of Halle-Wittenberg, Germany, 49954538;49336417, [Invited], [International presentation]

Marāgha Observatory in Climate Change: Between Theory, Practice and Politics in Mongol-Ruled Iran
Yoichi Isahaya
13th European Society for Environmental History Conference, 22 Aug. 2025, European Society for Environmental History, English, Public symposium
18 Aug. 2025 - 22 Aug. 2025, Uppsala University, Sweden, The Marāgha observatory, one of the foremost intellectual centers in the Ilkhanate (1256–1356), was founded in 1259. The timing might attempt us to conjecture some influence of the Samalas eruption around 1257, whose mega scale might have led the Mongols to reflect upon its heavenly portents. However, scientific practice at the observatory showed no interest in ongoing climate reorganization, while theoretical astronomy was innovated by scholars belonging to the so-called “Marāgha school.” In this regard, we are forced to encounter the distance between theory and practice both in heavenly and earthly sciences at that time. On the other hand, climate change certainly affected the Marāgha observatory not from the intellectual standpoint but in the political context. The third Ilkhan Aḥmad (1282–84), immediately after ascending the throne, embarked upon a series of political reform which attached certain importance to Baghdād, his power basis. Both of archives of nature and society tell us that this old capital of the Islamicate world suffered from climate-induced socioeconomic crisis in 1270s and 80s. Aḥmad’s reform to restore Baghdād was directly related to undermining the financial foundation of the Marāgha observatory on the grounds that he ordered to transfer the religious endowments (waqf) in Baghdād, which had been assigned to the observatory, to the “original” place. On this line, the relationship is entangled between climate change and sciences around the Marāgha observatory under the politics of the Ilkhanate, 49954538;49336417, [International presentation]

中世と近世との(In-)Commensurability：松方・大東総論へのコメントとして
諫早 庸一
「外交の世界史の再構築」第15回研究会, 10 Aug. 2025, 三菱財団人文科学研究助成「外交の世界史の再構築」, Japanese, Public discourse
10 Aug. 2025 - 11 Aug. 2025, 東京大学史料編纂所, Japan, [Invited], [Domestic Conference]

文理協働シリーズの目指すところ：「14世紀の危機」の解明に向けて
諫早 庸一
SRCセミナー「文理協働シリーズ：古銭学編」, 27 Jul. 2025, 北海道大学スラブ・ユーラシア研究センター, Japanese, Oral presentation
北海道大学スラブ・ユーラシア研究センター, Japan, 49954538;49336417

都市はいかにして消えたのか：駅伝・疫病・地震、文理と東西の総合
諫早 庸一
北海道中央ユーラシア研究会第151回例会, 18 Jul. 2025, 北海道中央ユーラシア研究会, Japanese, Oral presentation
北海道大学スラブ・ユーラシア研究センター, Japan, 49954538, [Domestic Conference]

Medium for Differences: “Conversion” as Imperial Practice in Mongol Eurasia
Yoichi Isahaya
Leeds International Medieval Congress, Session “Worlds of Learning in Mongol Eurasia, III: Translation, Translators, and Comparisons”, 09 Jul. 2025, University of Leeds, Japanese, Public symposium
07 Jul. 2025 - 10 Jul. 2025, University of Leeds, United Kingdom, Under the circumstances of constant change and encounter with new peoples, materials and information, the Mongols created their own sophisticated imperial method of “conversion” to enable interchangeable knowledges under their inter-continental domination. Modern concepts such as uniformity and integration were almost non-existent in this imperial space. For example, whether it is Ṭūsī’s Ilkhanid Astronomical Handbook or Rashīd al-Dīn’s Compendium of Chronicles, there is a multicultural array of calendars and histories. Each element is displayed as itself, and the Mongol achievement was not the “integration” of these elements, but their mutual “conversion”—or perhaps we could say “conversion formulae,” by which disparate cultural practices of the Eurasian peoples were maintained, but rendered easily “convertible” to each other., 49954538;49336417, [International presentation]

Discussions: State-Building, Little Ice Age and Centuries of Crisis
Yoichi Isahaya
Slavic-Eurasian Research Center 2025 Summer International Symposium “Eurasia's Tectonic Changes: Past and Present”, 04 Jul. 2025, Slavic-Eurasian Research Center, Hokkaido University, English, Nominated symposium
03 Jul. 2025 - 04 Jul. 2025, Slavic-Eurasian Research Center, Hokkaido University, Japan, 49954538, [International presentation]

The Dantean Anomaly in the Black Sea: Mongols, Genoese and Mamluks
Yoichi Isahaya
Rikkyo Public Lectures “Medieval Black Sea and Beyond”, 01 Jul. 2025, Department of History, Faculty of Arts, Rikkyo University, English, Public discourse
01 Jul. 2025 - 01 Jul. 2025, Rikkyo University, Japan, 古来、黒海はヨーロッパとアジア、スラヴ圏とイスラム圏など複数の域圏をつなぐ存在であった。中世期にビザンツ帝国がこの空間の制海権を喪失後、ジェノヴァやヴェネツィアといったイタリア海洋国家がこの海域に進出した。彼らはモンゴル帝国やマムルーク朝といった陸域の帝国と交渉しながら、奴隷や穀物を主要商品として、黒海をより広域な商業圏へと連結させてゆく。北岸と南岸の生態環境の相違とその変化は、黒海世界のいずれのアクターの行動にも大きな影響を与えた。「14世紀の危機」を決定づけた黒死病もまた、黒海をまたいでヨーロッパに至るのである。本講演会は、「14世紀の危機」を西方から見るマルティン・バウフ氏と東方から見る諫早庸一氏の研究を黒海で交錯させる試みである。, 49954538;49336417

Imperial Radius of the Golden Horde amid the Geopolitical Transformation of the Black Sea Region
Yoichi Isahaya
Survival Strategies International Workshop "Radius of Power in Premodern High Eurasia", 30 May 2025, Platform for Explorations in Survival Strategies at the Slavic-Eurasian Research Center, Hokkaido University, English, Oral presentation
29 May 2025 - 30 May 2025, Slavic-Eurasian Research Center, Hokkaido University, 49336417;49954538;46970215;42712287, [International presentation]

Introduction: Radius of Power in Premodern High Eurasia
Yoichi Isahaya
Survival Strategies International Workshop "Radius of Power in Premodern High Eurasia", 29 May 2025, Platform for Explorations in Survival Strategies at the Slavic-Eurasian Research Center, Hokkaido University, English, Oral presentation
29 May 2025 - 30 May 2025, Slavic-Eurasian Research Center, Hokkaido University, Japan, 49954538;42712287;49336417;46970215, [International presentation]

ダンテのアノマリ（1315～22年）と黒海世界：モンゴル、ジェノヴァ、マムルーク
諫早庸一
日本中東学会第41回年次大会公開講演会「海がつなぐ北ユーラシアと中東」, 17 May 2025, 日本中東学会, Japanese, Invited oral presentation
17 May 2025 - 18 May 2025, 北海道大学, Japan, 49954538, [Invited], [Domestic Conference]

シルクロード：交差する時間・空間・ディシプリン
諫早 庸一
日本中央アジア学会2024年度年次大会公開パネル「シルクロード：ユーラシアの道と日本」, 16 Mar. 2025, 日本中央アジア学会, Japanese, Nominated symposium
15 Mar. 2025 - 16 Mar. 2025, 東京外国語大学アジア・アフリカ言語文化研究所, 32428242;49336417, [Invited], [Domestic Conference]

フレグ・ウルスの農業危機：1319年反乱再訪
諫早 庸一
科研研究会「「14世紀の危機」についての文理協働研究：この4年間を振り返って」, 08 Mar. 2025, 科学研究費基金「「14世紀の危機」についての文理協働研究」（課題番号23K20485）, Japanese, Oral presentation
北海道大学スラブ・ユーラシア研究センター, Japan, 32428242;49336417, [Domestic Conference]

もうひとつの「天文対話」——モンゴル帝国期（1206～1368年）天文学の東西
諫早 庸一
武蔵大学東西文化融合史研究会第9回例会「（共通テーマ）知と技術の交流と融合：アジア世界で起きたこと」, 20 Dec. 2024, 武蔵大学東西文化融合史研究会, Japanese, Invited oral presentation
武蔵大学, Japan, 今回のテーマは天文学をめぐる東西の知識人による対話です。「天文対話」と言えばガリレオ・ガリレイ（1564～1642年）の著作と、そこで為される天動説と地動説との対話があまりにも有名です。ただし、この対話は——少なくともニコラウス・コペルニクス（1473～1543年）の時代において——あくまで幾何天文学という西方ユーラシアのパラダイムの枠内での対話でした。しかし、『天文対話』に先立つこと350年あまり、モンゴル帝国期（1206～1368年）のイランで、ムスリムの博学者ナスィール・アッ＝ディーン・トゥースィー（1201～74年）と中国から来た道教徒によって行われた対話は、前者の幾何天文学と後者の計量天文学という、それぞれに寄って立つパラダイムを異にした者同士の対話でした。異なる宇宙観を有する二者の「天文対話」は、何を主題として為され、結果として何を生み出し、果たして双方の宇宙観に影響を与えるものとなったのでしょうか。トゥースィーがペルシア語で記した中国暦の分析を通じて、もうひとつの「天文対話」の実相に迫ります。, [Invited], [Domestic Conference]

21世紀のシルクロード論争——黒死病はどこから来たのか
諫早 庸一
2024年度公開講座「シルクロード——交差する時間・空間・ディシプリン」, 28 Oct. 2024, 北海道大学スラブ・ユーラシア研究センター, Japanese, Public discourse
21 Oct. 2024 - 11 Nov. 2024, 北海道大学スラブ・ユーラシア研究センター, Japan, 20世紀の後半、「シルクロード論争」と後に呼ばれる議論が起こりました。シルクロードとそれがつないだ空間の歴史理解をめぐって交わされた議論は、結果としてユーラシア東西をむすぶシルクロード交易の具体相を解明し、この交易の盛衰がその南北に位置する遊牧社会と定住社会との相互関係に深くかかわっていることを我々に教えてくれました。両陣営からの議論の応酬は、結果としてシルクロードの多面に光を当てることとなり、この道が交差させた人・物・情報について、より深い理解を我々にもたらしたのです。

そして今また「21世紀のシルクロード論争」とでもいうべき議論が立ち上がっています。しかしそれは、20世紀の論争とはかなり様相を異にしています。まずその対象は疫病、より具体的にはペストです。ヨーロッパで「黒死病」と呼ばれ、実に人口の3割を消失させたとされるこのペスト・パンデミックについては、理系・文系の双方で分析が進められ、21世紀に入ってから研究が劇的に進展しました。

ペスト被害者の古人骨から採られた古遺伝子の解析から、パンデミックを引き起こすきっかけとなったペスト菌の多分岐は、現在の中国とクルグズスタンとの国境地帯にあたる天山山麓で起こっていたことが明らかになっています。この多分岐を経て、ながらく中央ユーラシア草原の動物の風土病であったペストは人体に破壊的な被害を及ぼすものとなり、ヨーロッパに大きな被害をもたらします。

しかし、この新発見はあらたな問いを生み出すものとなりました。天山山麓で覚醒したペスト菌は、いつどのようにしてヨーロッパに至ったのでしょう。これに関して、文系理系の多分野を巻き込んだ論争が起こっています。陣営の片方は「13世紀拡散説」。ペスト菌は13世紀の半ばにモンゴル帝国（1206～1368年）の拡大とともにユーラシア中に広がったとするものです。

しかしより近年になって、この説には疑問が呈されました。もし13世紀の半ばにユーラシアにペスト菌が拡散していたとすれば、それがパンデミックを引き起こすまでにどうして1世紀近くかかっているのでしょうか。もう片方の陣営、「14世紀拡散説」は、クルグズスタンのイシククル湖畔の古人骨調査から、ペスト菌がこの地でパンデミックを引き起こしたのはようやく14世紀の中葉だったとしています。そこから10年足らずのあいだに、ペストは沿線で大きな被害をもたらしながらヨーロッパに至るとするのです。

黒死病に関わる「21世紀のシルクロード論争」。両陣営の相違点、それぞれの利点と難点はどこで、何が解決すれば、どのような事実が明らかになるのでしょう。本講ではそれについて各分野の知見を可能な限り総合し、この論争の未来を考えていきます。, [Domestic Conference]

フレグ・ウルスの崩壊——「14世紀の危機」の解明に向けて
諫早庸一
シンポジウム「モンゴル帝国史研究の現在と課題」, 22 Jun. 2024, 内陸アジア史学会, Japanese, Invited oral presentation
22 Jun. 2024 - 22 Jun. 2024, 早稲田大学, Japan, 42712287;39604475;32428242, [Invited], [Domestic Conference]

From Genghis Khan to Tamerlane as a Socio-Ecological Transition: Climate Changes, Pandemics and Demographic Dynamics
Yoichi ISAHAYA
Mongol Zoominar Presents Book Launch, Peter Jackson’s From Genghis Khan to Tamerlane, 31 May 2024, Louis Frieberg Center for East Asia Studies at the Hebrew University of Jerusalem, English, Invited oral presentation
31 May 2024 - 31 May 2024, Online, 32428242, [Invited], [International presentation]

The “Imperial Itinerance” of the Golden Horde
Yoichi Isahaya
International Conference “The Golden Horde: Art, Material Culture, and Architecture”, 08 Dec. 2023, Max Planck Institute for the History of Science & Fritz Thyssen Foundation, English, Invited oral presentation
07 Dec. 2023 - 08 Dec. 2023, Harnack House, Conference Venue of the Max Planck Society, Germany, 42712287;31383080;24540777, [Invited], [International presentation]

Beyond Commensurability: Chinese Calendar in Islamicate Astronomical Handbook in the Period of the Mongol Empire (1206–1368)
Yoichi Isahaya
International Conference "Transmission, Translocation, and Transcreation: A Cultural Kinematics of Astral Knowledge", 14 Nov. 2023, Gerda Henkel Stiftung funded research project "Changing Episteme in Early Modern Sanskrit Astronomy" (CEEMSA), English, Invited oral presentation
13 Nov. 2023 - 15 Nov. 2023, University of Copenhagen, Denmark, The political unification of Central Eurasia by the Mongol empire (1206–1368) lowered social, economic, and cultural barriers on an Afro-Eurasian scale. However, even in this age of high mobility, there were only a few cases of direct cross-cultural collaboration between astronomers/astrologers from the western and eastern Eurasia against the backdrop of the high, often unbridgeable, differences between the Islamicate and Chinese astral sciences. These premises have emphasised the historical importance of the Chinese calendar in Persian (Cathay calendar), which appears in the Zīj-i īlḫānī (Īlḫānid astronomical handbook) by Naṣīr al-Dīn al-Ṭūsī (1201–74) as a result of his ‘astronomical dialogue’ with Fu Mengzhi 傅孟質 (fl. 1250s).

Investigation into the contents reveals that the Cathay calendar relied on an ‘official’ astronomical system (Chongxiu daming li 重修大明曆) of the same period in China for its astronomical constants, while at the same time, used simplified calculation method based on an ‘unofficial’ astronomical system (Futian li 符天曆) compiled in the Tang period (618–907) to obtain various numerical values. In the Chinese world, the Futian li was used for horoscopic astrology which purposed to predict a person’s life on the basis of a diagram of planetary positions at a peculiar moment—usually the time of one’s birth. The ‘astronomical dialogue’ might have revolved around the horoscopic astrology on the grounds that only this kind of astrology enabled to overcome the ‘incommensurability’ between the two astral traditions in the East and West of Eurasia, as casting horoscopes was very popular in the Islamicate world and also known in the Chinese world.

In this paper, I focus on this ‘astronomical dialogue’, paying due attention to the ‘disconnectivity’ in addition to the ‘connectivity’. In fact, the encounter between Eastern and Western astronomical knowledge in Mongol Eurasia cannot be simply divided into possible and impossible in terms of its (in)commensurability; the phenomena had the following four levels of gradation: (i) understood and connected, (ii) understood but did not connect due to underestimation, (iii) understood (to some extent) but did not connect, and (iv) neither understood nor connected. What kind of traditions and structures existed in the ‘astronomical knowledge’ of the East and West? Which parts of them were connected or not connected to each other? By considering these questions, I aim to provide a glimpse into the world history of astral sciences in the course of this talk., 32428242;24540777, [Invited], [International presentation]

14世紀の危機の語り方——ヨーロッパ到来以前の黒死病
諫早庸一
国立大学附置研究所・センター会議 第3部会（人文・社会科学系）シンポジウム「危機の世紀」, 13 Oct. 2023, 北海道大学スラブ・ユーラシア研究センター, Japanese, Oral presentation
北海道大学スラブ・ユーラシア研究センター, Japan, 32428242, [Domestic Conference]

Along the River or between the Two Seas: The Imperial Itinerance of the Golden Horde
Yoichi ISAHAYA
International Symposium: Water Networks, Islands, and Political Powers in the Global Middle Ages, 08 Oct. 2023, Grant-in-Aid for Scientific Research (A) "Maritime Networks, Islands, and Political Powers in Premodern Europe", English, Nominated symposium
06 Oct. 2023 - 08 Oct. 2023, Rikkyo University, Japan, 24540777, [Invited], [International presentation]

Islamicate Reading of the Chinese Calendar: Quṭb al‐Dīn al‐Shīrāzī (1236–1311)’s Note on a Topkapı Fragment (Ahmet III 3455)
Yoichi ISAHAYA
The 16th International Conference on the History of Science in East Asia, Panel 35 “Astral Sciences in Contexts of Cultural Encounters”, 22 Aug. 2023, International Society for the History of East Asian Science, Technology and Medicine, English, Public symposium
21 Aug. 2023 - 25 Aug. 2023, Goethe-Universität Frankfurt am Main, Germany, The westward invasion of the Mongols wielded a grave impact on the Islamicate world in the thirteenth century. The influence was, as well known, not confined to the political and military spheres. In the Mongol period (1206–1368), the Chinese calendar was first expounded in the zīj, Islamicate astronomical handbook with tables against the backdrop of the fact that the Chinse calendar held practical significance in several fields such as administration and historiography in Mongol-ruled Iran. Naṣīr al‐Dīn al-Ṭūsī (1201–74), a Muslim polymath, initiated the cross-cultural exchange by incorporating the Chinese calendar into his Persian astronomical handbook Zīj-i īlkhānī (ca. 1272) as a result of his “astronomical dialogue” with the “sage of Cathay,” Fu Mengzhi 傅孟質. The so-called “Cathay calendar” is remarkable as a unique production of direct collaboration by scholars on different intellectual foundations. Among the contents of the “Cathay calendar,” a section on the lunar anomaly is worthy of attention as the sole part, in which al-Ṭūsī very likely engaged in calculation independent from a couple of the Chinese original sources. Furthermore, Niẓām al-Dīn al-Nīsābūrī (d. ca. 1330), in his commentary upon the Zīj-i īlkhānī, made use of a geometrical diagram for explanation in this section. The West-Eurasian “geometrical cosmology” enabled the geometrical explanation of—a part of—the Chinese astronomy which was based on the “numerical cosmology” with no diagram. As a supplement of a series of investigation into the “Cathay calendar,” I will focus on an Istanbul manuscript (Topkapı Sarayı Müzesi, Ahmet III 3455) including folios, to which some tables of the “Cathay calendar” were attached with explanation. Most parts—probably the part of the “Cathay calendar, too—of the manuscript were copied by Quṭb al-Dīn al-Shīrāzī (1236–1311), a leading disciple of al-Ṭūsī, from December 1265/January 1266 up to 1268. Interestingly enough, the part on which al-Shīrāzī noted is also the section on the lunar anomaly. Therefore, the Topkapı fragment could be represented as the earliest—even before al‐Ṭūsī’s Zīj-i īlkhānī (ca. 1272)—Islamicate reading of the Chinese calendar., 24540777, [Invited], [International presentation]

Snowfall in Baghdad: The Mongol Empire on the Threshold of the Little Ice Age
Yoichi Isahaya; Takeshi Nakatsuka
Slavic-Eurasian Research Center 2023 Summer International Symposium, "The Phase of Catastrophe: The Crisis of the 14th Century in Afro-Eurasian Context", 13 Jul. 2023, The Slavic-Eurasian Research Center, English, Nominated symposium
13 Jul. 2023 - 14 Jul. 2023, The Slavic-Eurasian Research Center, Japan, 39604475;32428242, [International presentation]

知識、文化、そして自らを〈換算〉する——モンゴル帝国のユーラシア統治
諫早庸一
【ポスト・コロナ時代のグローバル・ヒストリー研究】公開講演会, 27 May 2023, 早稲田大学高等研究所, Japanese, Invited oral presentation
早稲田大学高等研究所, Japan, 1206 年にモンゴル高原の諸部族を糾合し、帝国の祖となったチンギス（在位1206～1227年）とその後継者たちはその後わずか半世紀ほどのあいだに、中国・中央アジア・ロシア・イランといった地域を直接支配下に置く、史上最大の陸上帝国を現出させた。モンゴルのユーラシア統治は、その支配領域の各地において通行税その他の課税や道中の略奪者たちを取り除き、地域間交流をそれ以前にはない規模で高めることとなる。モンゴル帝国（1206～1368年）の建設によって創出されたこのような状況は、よく「パクス・モンゴリカ（モンゴルの平和）」と表現される。本講演では、この「パクス・モンゴリカ」のなかでのモンゴルの達成を〈換算（conversion）〉と表現したい。モンゴル帝国はユーラシアの人・物・情報の〈換算〉を実現した。その例は、銀塊や銀貨、紙幣といった貨幣、重さや長さといった度量衡や、旧約聖書・イラン神話・ユーラシア遊牧伝承をあわせた歴史、さらには暦や宗教、言語・文書にまでわたる総体的なものであった。モンゴル帝国による〈換算〉とは、いかなる特徴や意義を有しているのだろうか。それを種々の政治・経済・文化的要素や、近代帝国との比較のなかでみていきたい。, 32428242;24540777, [Invited], [Domestic Conference]

A Strange Parallel? Agrarian Crisis with Economic Efflorescence in 14th-Century Mongol Eurasia
Yoichi ISAHAYA
International Conference "Great Chinggisid Crisis: History, Context, Aftermath", 12 May 2023, Department of Sinology, University of Bonn, English, Invited oral presentation
11 May 2023 - 13 May 2023, University of Bonn, Germany, 32428242;39604475, [Invited], [International presentation]

“Converting” Knowledge, Culture and Themselves: Mongols’ Imperial Rule in Thirteenth- and Fourteenth-Century Eurasia
Yoichi ISAHAYA
Nexus of Knowledge: Science, Medicine, and Technology on the Silk Roads, 28 Apr. 2023, Tang Center for Silk Road Studies, English, Invited oral presentation
27 Apr. 2023 - 29 Apr. 2023, University of California, Berkeley, United States, The Mongol empire (1206-1368) attached high importance to sciences as the other empires. Their approach to sciences, however, was something unique in comparison with the modern empires (and the Chinese dynasties in the field of astronomy). I characterize such uniqueness with the term of "conversion." While the modern empires made use of science to integrate political, economic and cultural varieties into their own system with their own criteria, the Mongol empire utilized sciences to convert one of such varieties into another to connect various cultural spheres, over which they ruled. The Mongols connected Eurasia through "conversion" that enabled varieties to be at their disposal. The Mongol imperial project, that is termed "conversion," was not confined to calendar conversion, but extended to other fields such as historiography, decree writing, monetary circulation, and standardization of weights and measurements., 32428242;24540777, [Invited], [International presentation]

Did the Climate Change Shake the Empire? In the Case of the Mongols in 1270’s and 80’s.
Yoichi ISAHAYA
2023 Spring Conference of the Society of Ecological and Environmental History, “Environment and Diseases.”, 22 Apr. 2023, Society of Ecological and Environmental History, English, Invited oral presentation
22 Apr. 2023 - 22 Apr. 2023, Online, Korea, Republic of, This paper is to consider the history of the Mongol empire (1206–1368) in the context of the socio-climatic transition from the Medieval Warm Period (ca. 800–ca. 1260) to the Little Ice Age (ca. 1550–ca. 1910). After consolidating tribal powers in Mongolia, Chinggis (r. 1206–27) succeeded in a series of military expeditions to Northern China, the Gansu Corridor and Central Asia under a favorable climatic condition called the 15-year Mongol Pluvial (1211–25). By the time of the death of Möngke (r. 1251–59), the empire ruled over almost all of the steppes in Central Eurasia. No more vast steppes existed next to the imperial territories. Such environmental conditions acted as barriers against the further Mongol invasion except for Southern China, where the Mongols overcame the ecological difficulty by means of the Han navies. Since the fall of the Southern Song in 1279, the empire stopped its expansion, which was followed by the dissolution of the united empire into the four regional khanates/uluses. This paper attempts to calibrate the impact of climate change, which became tangible in Eurasian scale especially from 1270’s, as well as the abovementioned topographical constraints. In the Ilkhanate in Iran, the period from the death of Abaqa (r. 1265–82) to the coronation of Ghazan (r. 1295–1304) is marked with instability. The Golden Horde in Russia was also in the political disturbance after the reign of Möngke-Temür (1266/67–ca. 82) to the time when Toqta (r. 1291–1312) ascended the throne. In the case of the Yuan dynasty in China, Qubilai’s reign (r. 1260–94) suffered a remarkable setback with timing of the death of the empress Čabui (d. 1281), while Qaidu (r. 1271–1301)—Qubilai’s formidable adversary—reached the height of his power in 1280’s–90’s in Central Asia. This paper is to shed a new light on the history of the Mongol empire by focusing on 1270’s to 80’s from the standpoint of Eurasian-scale climate change., 32428242;39604475, [Invited], [International presentation]

モンゴル支配期イランにおける中国暦の導入——もうひとつの「天文対話」
諫早庸一
人文科学研究所主催公開研究会（「東方思想の発展と交錯」チーム）, 17 Mar. 2023, 中央大学人文科学研究所, Japanese, Oral presentation
中央大学（オンライン）, Japan, 「天文対話」と言えばガリレオ・ガリレイ（1564～1642年）の著作と、そこで為される天動説と地動説との「対話」があまりにも有名である。しかし、この「対話」は——少なくともニコラウス・コペルニクス（1473～1543年）の時代において——あくまで幾何天文学という西方ユーラシアのパラダイムの枠内での「対話」であった。しかし、それに先立つこと350年あまり、モンゴル帝国期（1206～1368年）のイランでムスリムの博学者ナスィール・アッ＝ディーン・トゥースィー（1201～74年）と「キタイの賢人」として史料に現れる傅孟質によって行われた「対話」は、前者の幾何天文学と後者の計量天文学という、それぞれに寄って立つパラダイムを異にした者同士の「対話」であった。この「天文対話」は如何にして起こり、何をもたらしたのか。当時のペルシア語史料と漢語史料を重ね合わせることで、もうひとつの「天文対話」の実相に迫る。, [Domestic Conference]

Locus for Power, Locus for Intellect: Tūsī Family at the Marāgha Observatory
Yoichi Isahaya
Echoes from the Medieval West Asian Cities, 04 Mar. 2023, Grant-in-Aid for Scientific Research on Innovative Areas "The Essence of Urban Civilization: An Interdisciplinary Study of the Origin and Transformation of Ancient West Asian Cities" (Research Group 05: Historical Research on the Urban Structure of West Asian "Islamic Cities"), English, Invited oral presentation
04 Mar. 2023, The University of Tokyo, Japan, [Invited], [International presentation]

両海の覇者たち——ジョチ・ウルスにおける〈移動〉のポリティクス
第58回野尻湖クリルタイ［日本アルタイ学会］, 16 Jul. 2022, Japanese, Oral presentation
16 Jul. 2022 - 17 Jul. 2022, 野尻湖（オンライン）, Japan, 32428242, [Invited], [Domestic Conference]

コメント——歴史の遠隔相関と〈奇妙な並行〉
諫早庸一
西洋中世学会第14回大会シンポジウム「危機を前にした人間——西洋中世における環境・災害・心性」, 19 Jun. 2022, 西洋中世学会, Japanese, Nominated symposium
18 Jun. 2022 - 19 Jun. 2022, 立教大学, Japan, [Invited], [Domestic Conference]

趣旨説明——歴史学と古気候学をつなぐ
諫早庸一
書評会「中塚武『気候適応の日本史』を読む」, 13 Jun. 2022, Japanese, Oral presentation
13 Jun. 2022, オンライン, Japan, 32428242, [Domestic Conference]

The Afro-Eurasian Crisis of the 14th Century in the Ilkhanid Context
Yoichi ISAHAYA
The Spring International Conference 2022 "Globalization and Localization of Mongolian Studies.", 25 Mar. 2022, Korean Association for Mongolian Studies, English, Invited oral presentation
25 Mar. 2022 - 26 Mar. 2022, Online, Korea, Republic of, The “Crisis of the 14th Century” consisted of climate change, continental pandemic, and political disorder in the 14th century. It occurred in grand transition from the Medieval Climate Anomaly to the Little Ice Age on a global scale, which resulted in the collapse of the Mongol empire (1206–1368). This paper attempts to re-read the history of the Ilkhanid dynasty (c. 1256–1357), which ruled over Iran and Iraq as a part of the Eurasian empire, from an environmental perspective., 32428242, [Invited], [International presentation]

Knowledge-Integration vs. Knowledge-Conversion: Mongols' Imperial Attitude toward Sciences
Yoichi ISAHAYA
The Mongol Empire's Zoominar: "Knowledge and Empire", 17 Dec. 2021, Louis Frieberg Center for East Asia Studies at the Hebrew University of Jerusalem, English, Invited oral presentation
17 Dec. 2021 - 17 Dec. 2021, Online, Israel, [Invited], [International presentation]

「大遷移」のユーラシア的文脈——朴興植氏の論考に寄せて
諫早庸一
第21回日韓歴史家会議「伝染病と歴史」, 12 Nov. 2021, 日韓歴史家会議組織委員会; 国際歴史学委員会日本国内委員会, Japanese, Invited oral presentation
12 Nov. 2021 - 13 Nov. 2021, ソウル（オンライン）, Korea, Republic of, [Invited], [International presentation]

Network Cut Off: The Marāgha Observatory and the Tūsī Family
Yoichi ISAHAYA
5th Meeting of the Mongol Empire Spring Series "By Land & By Sea: Cultural and Οther Networks of Exchange in Mongol Eurasia and Beyond", 13 Sep. 2021, University of Vienna and International Hellenic University, English, Oral presentation
13 Sep. 2021 - 14 Sep. 2021, Thessaloniki & On-Line, Greece, The Marāgha observatory that established under the directorship of Naṣīr al-Dīn al-Ṭūsī (1201–74) became one of the foremost intellectual centers in Eurasian scale. Ṭūsī was permitted by Hülegü (r. 1256–65) to appropriate the whole revenues of the religious endowments (awqāf) in the lkhanid realm for the expenses of the human and material resources at the Marāgha observatory. As the trustees of the revenues and interpreters of the heavenly portents, the Ṭūsī family exerted considerable power under the reign of the Ilkhanid rulers. Therefore, the Ṭūsī family was inseparable from the Marāgha observatory. Under these circumstances, Marāgha was situated on the way of the Ilkhanid itinerant rule between the summer and winter quarters. However, the intellectual center existed on the swinging situation of the Ilkhanid politics. Although Aṣīl al-Dīn Ḥasan (d. 1315)—the last heir of the family property—benefited himself from high status at the court, he eventually met his death in disgrace during the reign of Öljeitü (r. 1304–16). The Marāgha observatory, the power basis of the Ṭūsī family, shared the fate of the family. Maragha was included in Öljeitü’s itinerary was no later than 1309 one year before Aṣīl al Dīn’s downfall. With the creation and expansion of networks in Mongol Eurasia, their cutoff moment also deepens our understanding of the mobility of the Mongol empire., [International presentation]

独リト雖モ天ニ近シ: ニザール派山岳政権（1090～1256年）における天文学
第12回海域ヨーロッパ研究会, 05 Sep. 2021, Japanese, Oral presentation
24540777

The Ulus of Jochi as the Empire of Three Seas
北海道中央ユーラシア研究会第141回例会, 26 Aug. 2021, 北海道中央ユーラシア研究会, Japanese, Oral presentation
オンライン, Japan, 32428242

中国天文学を幾何学化すること——ニザーム・アッディーン・ニーサーブーリー『真理の解明』（1308年頃）における試み
諫早庸一
イスラーム・セミナー, 04 Jun. 2021, 慶應義塾大学言語文化研究所, Japanese, Invited oral presentation
04 Jun. 2021 - 04 Jun. 2021, オンライン, Japan, モンゴル帝国（1206～1368年）による中央ユーラシアの政治統合は、アフロ・ユーラシアにおける人・物・情報の相互交流をかつてない規模にまで高めた。「天/テングリ」を信仰し、天命を地上の支配の指針としたモンゴルは、天象を識るための学知たる天文学に格別の関心を寄せていた。こうした状況のなかで、これまで個別に発展してきた東西ユーラシアの天文学が接触する。ニザーム・アッ＝ディーン・ニーサーブーリー（1330年頃没）の手になるペルシア語天文書『真実の解明（Kashf al-Ḥaqāʾiq）』（1308/09年編）は、中国暦（の一部）を西方ユーラシア伝統の幾何学図でもって表現した、恐らくは世界で最初のものである。14世紀イランのムスリム学者が為した中国天文学を幾何学化する試みは、アフロ・ユーラシアの天文学史に何を残すものとなったのか。当時の天文学交流の一端を、一枚の幾何学図から読み解く。, [Invited], [Domestic Conference]

From Alamut to Dadu: Bīrūnī on the Mongol Silk Roads
Yoichi ISAHAYA
Symposium on Calendars used in Asia (West-, South-, Southeast-, East-) and Oceania, 16 Mar. 2021, National Astronomical Observatory of Japan & Anthropological Institute of Nansan University, English, Invited oral presentation
15 Mar. 2021 - 16 Mar. 2021, Online, Japan, [Invited], [International presentation]

A Cross-Cultural “Astronomical Dialogue” between a Muslim Polymath and Chinese Sage in Thirteenth-Century Eurasia
Yoichi ISAHAYA
Seminar Series at the Institute for Medieval Studies, University of Leeds, 09 Feb. 2021, Institute for Medieval Studies, University of Leeds, English, Public discourse
Online, United Kingdom, [Invited], [International presentation]

三水系の帝国——ジョチ・ウルス、北方シフト、草原の道
諫早庸一
第６回海域ヨーロッパ研究会, 19 Dec. 2020, Japanese, Public discourse
24540777, [Invited]

「14世紀の危機」研究の現在
諫早 庸一
公募プロジェクト型共同研究「「14世紀の危機」に関する文理協働研究——北東アジア地域を突破口として」キックオフ・ワークショップ「前近代ユーラシア東西における気候変動と社会」, 03 Oct. 2020, 北海道大学スラブ・ユーラシア研究センター, Japanese, Nominated symposium
03 Oct. 2020 - 03 Oct. 2020, 北海道大学スラブ・ユーラシア研究センター, Japan, [Domestic Conference]

Asking Culture in Global History: On a Diagram of Astral Sciences in Mongol Eurasia
Yoichi ISAHAYA
A Workshop on the Research Project towards a Global History of Culture Chuo Research Institute Symposium Series, 15 Sep. 2020, 中央大学学術シンポジウム「グローバル文化史の試み」, Japanese, Oral presentation
歴史学の理論家としてグローバル史、文化史について多くを発言なさってきた大家、長谷川貴彦先生をお迎えし、グローバル史と文化史の関係につき、ご講演いただく。研究員の諫早庸一、縄田雄二が、それぞれが行ってきた研究の具体例を15分ほどずつで紹介、そのあと三者間で、また聴衆も含め、グローバル文化史の理論と実践につき議論する。, [Domestic Conference]

Persian Scholar “Calculating” Chinese Astronomy: “Astronomical Dialogue” in 13th- and 14th-Century Mongol Eurasia.
Yoichi ISAHAYA
部局横断シンポジウム「計算科学が拓く汎分野研究」, 31 Oct. 2019, 北海道大学共同利用・共同研究拠点アライアンス, Japanese, Nominated symposium
北海道大学医学部学友会館フラテホール, [Invited], [Domestic Conference]

What is the "14th-Century Crisis"?
Yoichi ISAHAYA
Central Eurasian Studies Workshop in Hokkaido "The 14th-Century Crisis in Question: For Further Collaboration between Sciences and Humanities", 05 Oct. 2019, 北海道中央ユーラシア研究会, Japanese, Nominated symposium
The Slavic-Eurasian Research Canter, Hokkaido University, [Domestic Conference]

Project for the "14th-Century Crisis": The Current Status and Future Prospects
Yoichi ISAHAYA
地震研究所共同利用研究集会「歴史上の自然現象をめぐる諸分野の対話」, 19 Aug. 2019, Earthquake Research Institute, University of Tokyo, Japanese, Invited oral presentation
Earthquake Research Institute, University of Tokyo, [Invited], [Domestic Conference]

The Mongols Migrating Time: Did They Try to Unify Calendars in 13th and 14th Century Eurasia
Yoichi ISAHAYA
Workshop for Slavic Studies in Hokkaido, 12 Jul. 2019, Japanese, Invited oral presentation
The Slavic-Eurasian Research Canter, Hokkaido University, [Invited], [Domestic Conference]

Maragha across the Euphrates: The Observatory in Mamluk Sources
Yoichi ISAHAYA
The Sixth Conference of the School of Mamluk Studies, 16 Jun. 2019, The School of Mamluk Studies, English, Public symposium
Waseda University, [International presentation]

An Approach of Environmental History to the "14th Century Crisis"
Yoichi ISAHAYA
Japan Geoscience Union Meeting 2019, 27 May 2019, Japanese, Invited oral presentation
Makuhari Messe, [Domestic Conference]

From Alamūt to Marāgha: Religious Polarization and Scientific Commonalization
Yoichi ISAHAYA
Mongol Empire Spring Series M.E.S.S. 2019 Workshop "Religions in Mongol Eurasia", 15 May 2019, The Department of History (University of Vienna), the Institute for Austrian Historical Research (University of Vienna), and the Institute of Iranian Studies, English, Oral presentation
University of Vienna, [International presentation]

Sciences in Zomia: Nizārī Ismāʿīlī Movements (1090–1256) in the Iranian Plateau
Yoichi ISAHAYA
Medieval Zomias: Stateless Spaces in the Global Middle Ages, 09 Feb. 2019, Faculty of History, University of Oxford, English, Nominated symposium
University of Oxford, [Invited], [International presentation]

Drawing Chinese Astronomy within Islamicate Astral Tradition: A Way of Representing Otherness in Case of 14th-Century Iran
Yoichi ISAHAYA
The Lecture Series of the Department of History at Fudan University, 18 Dec. 2018, The Department of History at Fudan University, English, Public discourse
Fudan University, [Invited], [International presentation]

The Yuan Era, the Period without Translation: Cultural Transmitters in the Mongol Imperial Ideology
Yoichi ISAHAYA
European Society for the History of Science Biennial Conference 2018, 15 Sep. 2018, European Society for the History of Science, English, Public symposium
UCL Institute of Education, [International presentation]

Cross-Cultural Highway in Mongol Eurasia: Chinese Calendar in the Zīj-i Īlkhānī
Yoichi ISAHAYA
Persian Historical Materials and the Research of Mongolian and Yuan History in the 13th -14th Centuries, 26 Aug. 2018, English, Invited oral presentation
Inner Mongolia University, [Invited], [International presentation]

The “Second” Impact on Chinese Astral Tradition: Islamicate Astral Knowledge in the Yuan-Ming Period
Yoichi ISAHAYA
2018 Annual Conference "Eurasian Connection", 20 Aug. 2018, Center for Global Asia, English, Nominated symposium
NYU Shanghai, In this paper, I aim to single out the uniqueness of the impact of Islamicate astral knowledge on the Chinese astral tradition in the Yuan and early Ming periods in comparison with the “first” impact from Buddhist corpus and the “third” impact from Jesuit missionaries. To calibrate each impact, I introduce the concept of the “translation-naturalization paradigm.” The paradigm is defined as a typical pattern of the long-standing integration process of “foreign” sciences into a certain culture, which consists of the initial translation and the following naturalization—albeit, in general, the two processes overlap to some extent. This paradigm can be well applied to the “first” and “third” impacts on the Chinese astral tradition, while the “second” impact from the Islamicate astral sciences did not develop the paradigm in the sense that, first of all, no foreign text was translated into Chinese in this period as far as extant sources are concerned. In considering the characteristics of the “second” impact, I attach a certain importance to the attitude of the Mongol rulers. The Mongols were ultimately responsible for the remarkable expansion of Islamicate astral knowledge on the Chinse astral tradition; on the other hand, their attitude towards these sciences might have also functioned as an obstacle for the integration of Eurasian scientific knowledge., [Invited], [International presentation]

Mesoscopic Analysis for the Global Middle Ages: The Ilkhanid Translation Project as a Case
Yoichi ISAHAYA
The Resonant Middle Ages: Transmission of Political and Scientific Thoughts between Medieval Europe, Persia, and China in Global History, 07 Jul. 2018, 私立大学戦略的研究基盤形成支援事業「近代日本の人文学と東アジア文化圏 ―東アジアにおける人文学の危機と再生」, English, Invited oral presentation
Waseda university, [Invited], [International presentation]

Rashīd al-Dīn's Delineation of Chinese Voices and Letters in His Tānksūqnāma
Yoichi ISAHAYA; Mitsuaki ENDO
Designing Voices and Letters: The Mongols as an Empire of Communication, 01 Jul. 2018, Research Project Towards a Global History of Culture Chuo Research Institute Symposium Series, English, Public symposium
Chuo University Surugadai Memorial Hall, The discussion of this paper revolves around Rashīd al-Dīn’s (1249–1318)—a vizier of
the Ilkhanid dynasty (ca. 1256–1357)—strong concern with Chinese sounds/voices and
letters in his translation work, Tānksūqnāma. He even sometimes made use of newlyinvented
“Persian” letters, in order to precisely represent Chinese sounds. From the macro perspective, Rashīd al-Dīn’s such concern can be understood in line with his intention to integrate two Eurasian scientific traditions. On the other hand, however, we
should also situate his immense interest in Chinese voices and letters in the micro
perspective—in the Ilkhanid context. The Ilkhanid translation project initiated by
Rashīd al-Dīn, in which Tānksūqnāma was expected to be produced, was actually part
of his larger-scale compilation of his complete works including the Jāmiʿ al-Tawārīkh, a world history. In compiling the world history, Rashīd al-Dīn turned his attention toward the way of the transmission of knowledge—especially history—in each nation. In fact, the contents of the introduction of the History of China in the world history mainly deal with the Chinese way of transmitting knowledge including Chinese characters, which is also found in the introduction of the Tānksūqnāma. Rashīd al-Dīn’s delineation of Chinese voices and letters in his Tānksūqnāma, therefore, came out both of the macro and micro perspectives in the period of the Mongol empire., [International presentation]

Pax Mongolica in the Global History of Astral Sciences: Out of the Translation-Naturalization Paradigm
Yoichi ISAHAYA
Asian Studies Conference Japan, 30 Jun. 2018, English, Nominated symposium
International Christian University, To the translation movement in the ‘Abbasid dynasty (750–1258), Abdelhamid Sabra applied the term “naturalization” in the sense that this process should be described as a series of activities of appropriation rather than mere reception. Through this long-standing process, the Hellenistic scientific tradition was integrated into the intellectual arena of the Islamicate world. Regarding astral sciences, this translation-naturalization paradigm is also found in Eastern Eurasia, in which “western” astral sciences—mainly horoscopic astrology—were embedded into East Eurasian cultural sphere through the initial translation in the Tang period (618–690, 705–907) and the following congruence with indigenous celestial divination till the Song period (960–1279). This paper argues that such a seemingly global paradigm is not well applicable to the case of the period of the Mongol empire (1206–1368). Around the 13th and 14th centuries, the Mongols facilitated continental-scale communication and commerce—the so-called “Pax Mongolica,” in which people, commodities, art and knowledge were disseminated across Eurasia. However, what the largest landmass empire created was rather a sort of “cultural highway” which connected distant cultural zones, but did not necessarily bring about the integration of local cultures through either translation or naturalization. The paradigm is more applicable to the following era, the period of Ming dynasty (1368–1644)., [International presentation]

Eurasia in 13th and 14th Centuries from Astral Sciences: Nasīr al-Dīn Tūsī as A Cultural Pivot
Yoichi ISAHAYA
The Symposium of the Historical Society of Rikkyo University "Are the 13th and 14th Centuries a Watershed in the Maritime Asian History?", 23 Jun. 2018, The Historical Society of Rikkyo University, Japanese, Nominated symposium
Rikkyo university, [Invited], [Domestic Conference]

A Hidden Conduit to the Summit: Study on the Futianli 符天曆 in the Yuan Era
Yoichi ISAHAYA
The 14th Biennial Conference of Asian Studies in Israel, 24 May 2018, English, Oral presentation
The Hebrew University of Jerusalem, In this paper, I will focus on the Futianli符天曆 [Astronomical System Tallying with heaven] in the context of knowledge circulation in the Mongol empire. The astronomical system was compiled by Cao Shiwei曹士蔿 in the middle of the Tang period (780-783). Being mainly for horoscopic astrology, itwas called a non-official system 小曆 (xiaoli), and was never officially adopted by any Chinese dynasty. However, in fact, it was quite current until the period of the Yuan dynasty (1271-1368) in Chinese “folk astronomy,” and some officials at the Astronomical Bureau even referred to it for astrological annotations. In the Yuan era, the usage of this astronomical system extended to some “peripheries”—such as Japan and Iran—of the Mongol empire. On the other hand, the system was also designated as a text for the entry examination of the Yuan Astronomical Bureau, and some of the calculation methods were absorbed into the Yuan official astronomical system, Shoushili 授時曆 [Season-Granting Astronomical System]. The Futianli will provide us with a remarkable example to elucidate both the “horizontal” transmission of astral knowledge on a Eurasian scale and the “vertical” channel between the Yuan official and folk astronomy., [International presentation]

Bīrūnī’s Revival along the Mongol Silk Roads
Yoichi ISAHAYA
The Mongols and the Silk Roads, 11 May 2018, English, Oral presentation
University of Szeged, Faculty of Arts, Abū Rayḥān Muḥammad b. Aḥmad al-Bīrūnī (973–1048) was an eleventh-century savant who contributed to the development of mathematical and astral sciences in the eastern Islamic world. He also broadened the horizon of Muslim knowledge through his writings such as the “Description of India” which takes all India as its subject and “The Chronology of Ancient Nations” dealing with calendars used from ancient times onwards in the known world. This presentation aims to give insight into a less-known “revival” of his works in the period of the Mongol empire (1206–1368). It has already been known that some of his works were revitalized in the new context of Mongol-ruled Iran under the regime of the Ilkhanate (ca. 1256–1357). Naṣīr al-Dīn al-Ṭūsī (1201–74) referred to al-Qanūn al-Masʿūdī, al-Bīrūnī’s astronomical handbook, in order to compile his Zīj-i Īlkhānī. An illuminated manuscript of the Chronology of Ancient Nations, the so-called “Edinburgh al-Bīrūnī manuscript,” was produced along with concern of Rashīd al-Dīn (1249–1318) who had immense interest in the chronologies of other communities in the process of compiling his world history, Jāmiʿ al-Tawārīkh. On the other hand, I will turn our attention toward the eastern part of the empire by demonstrating that al-Qanūn al-Masʿūdī was also transmitted along with the Mongol Silk Roads into the intellectual sphere of the Yuan dynasty (1271–1368) probably through the hands of Jamāl al-Dīn (d. ca. 1289). The argument will be cemented in consideration of a linkage between the work and others also brought into Yuan China., [International presentation]

Reconstructing the Chinese-Hijri Calendar Conversion Table in the Ilkhanid Astronomical Handbook: Reconsidering the Inter-Dynastic Exchange of Astral Sciences in Mongol Eurasia
Takashi SUGA; Yoichi ISAHAYA
The Fifth Symposium on Historical Astronomical Records and Modern Science, 24 Mar. 2018, Japanese, Oral presentation
National Astronomical Observatory of Japan, [Domestic Conference]

Rendering External Knowledge into Internal Politics: Rashīd al-Dīn’s “Encyclopaedia Sinica” in the Tānksūqnāma
Yoichi ISAHAYA
Migrations in Mongol Eurasia: People, Ideas, Artefacts, 19 Dec. 2017, ERC Project "Mobility, Empire and Cross Cultural Contacts in Mongol Eurasia", English, Public symposium
The Hebrew University of Jerusalem, [International presentation]

Geometrizing Chinese Astronomy? The View from a Diagram in the Kashf al-Ḥaqā’iq by al-Nīsābūrī (d. ca. 1330)
Yoichi ISAHAYA
Traditional Sciences in Asia 2017: East-West Encounter in the Sciences of Heaven and Earth, 26 Oct. 2017, English, Oral presentation
Kyoto University, [International presentation]

Fu Mengzhi: "The Sage of Cathay" in Mongol Iran and the Two-Way Exchange of Astral Sciences along the Silk Roads
Yoichi ISAHAYA
Cross-Cultural Contacts during the Period of Pax Mongolica, 23 Oct. 2017, Ewha Womans University, English, Invited oral presentation
Ewha Womans University, [Invited], [International presentation]

Ilkhanid Translation Project: Toward Meso-History between Global and Local Perspectives
Yoichi ISAHAYA
International Medieval Congress 2017, 06 Jul. 2017, English, Public symposium
University of Leeds, [International presentation]

Hülegüid Appanages: As Mesoscale Agency in Cross-Cultural Exchange
Yoichi ISAHAYA
Networks, Regions and Institutions in Mongol Eurasia: A Meso-Historical Analysis, 18 May 2017, English, Oral presentation
The Hebrew University of Jerusalem, [International presentation]

Sino-Iranica in Pax Mongolica: The Elusive Participation of Syriac-Rite Christians in the Ilkhanid Translation Project
Yoichi ISAHAYA
Marco Polo and the Silk Road (10th–14th Centuries), 20 Oct. 2016, English, Invited oral presentation
Peking University, [Invited], [International presentation]

Li 曆 into Zīj: Two Eurasian Astral Sciences in Mongol Eurasia
Yoichi ISAHAYA
Seminar Series of the Sultan Qaboos Chair in Middle Eastern Studies, 12 Oct. 2016, Sultan Qaboos Chair in Middle Eastern Studies, Japanese, Public discourse
The University of Tokyo, [Invited], [Domestic Conference]

Regulating the Present, Prescribing the Future: Socio-Political Context of the Astronomical Dialogue in Mongol Eurasia
Yoichi ISAHAYA
The 13th Biennial Conference of Asian Studies in Israel, 19 May 2016, English, Public symposium
The Tel-Hai College, [International presentation]

Chinese Calendar in Persian under Mongol Domination: Two-Way Exchange of Astral Sciences across Eurasia
Yoichi ISAHAYA
The Fifth Symposium on History of Astronomy, 25 Mar. 2016, English, Invited oral presentation
National Astronomical Observatory of Japan, [Invited], [International presentation]

Entangled Representation of the Heaven: Dunhuang Fragment P. 4071 in the Transition and Naturalization of the Western Astral Science
Yoichi ISAHAYA
The 19th Asian Studies Conference Japan, 20 Jun. 2015, English, Public symposium
Meiji Gakuin University, [International presentation]

Tallying with Heaven: The Fu-Tian Li 符天曆 in the Naturalization of a “Western” Astral Science in China
Yoichi ISAHAYA
International Workshop on Traditional Sciences in Asia 2015: An Interdisciplinary Investigation into Overlapping Cosmologies, 17 Jun. 2015, English, Oral presentation
Kyoto University, [International presentation]

Cross-Cultural Dialogue between a Chinese Sage and Muslim Polymath: Chinese Calendar in the Īlkhānīd Zīj as the Embodiment of the Astronomical Dialogue
Yoichi ISAHAYA
Mobility and Transformations: New Directions in the Study of the Mongol Empire, 01 Jul. 2014, English, Oral presentation
The Hebrew University of Jerusalem, [International presentation]

Reconsidering Spheres in the Celestial and Terrestrial Dimensions: The Qiyao rangzai jue, Fu tian li, and Their Application
Yoichi ISAHAYA
Astral sciences in context 1: Relations between various types of sources, variety of milieus: “Theoretical texts and ephemerides“, 23 May 2014, SAW, English, Public discourse
Université Paris Diderot, [International presentation]

ʿIlm al-Mīqāt and ʿIlm al-Hayʾa: The Role of Maragha in the Differentiation of Astronomy
Yoichi ISAHAYA
Maragha and its Scholars. The Intellectual Culture of Medieval Maragha, ca. 1250-1550, 07 Dec. 2013, IMPAct, English, Invited oral presentation
The German Oriental Institute, [Invited], [International presentation]

A Chinese Calendar in Persian: The Missing Link in Chinese Astronomy
Yoichi ISAHAYA
24th International Congress of History of Science, Technology and Medicine, 23 Jul. 2013, English, Public symposium
The University of Manchester, [International presentation]

‘Sons of Heaven’ underneath the Western Sky: Chinese Calendrical System in Persian during the Mongol Period
Yoichi ISAHAYA
Annual Conference of the Association for Asian Studies, 23 Mar. 2013, English, Public symposium
Manchester Grand Hyatt, [International presentation]

Negotiating with Modernity: Transmission of ‘the History of Science’ into Nineteenth Century Iran
Yoichi ISAHAYA
The Second Congress of the Asian Association of World Historians, 28 Apr. 2012, Asian Association of World Historians, English, Public symposium
Ewha Womans University, [International presentation]

Gravity of Modernity: Reactions to the ‘New Astronomy’ in Japan and Iran
Yoichi ISAHAYA
Todai Forum, 21 Oct. 2011, English, Oral presentation
ENS Lyon, [International presentation]

Chinese Terminology in ‘Persian’ Chinese Calendrical System
Yoichi ISAHAYA
Scientific and Philosophical Heritage of Nasir al-Din Tusi, 24 Feb. 2011, Iran's Written Heritage Research Institute, English, Oral presentation
National Library of Iran, [Invited], [International presentation]

Vicissitudes of Nourūz/New Year’s Festival in the Iranian Context
Yoichi ISAHAYA
Graduate Student Workshop on Secularization, Religion and the State, 21 Jan. 2010, English, Oral presentation
National University of Singapore, [International presentation]

Tarikh-i Khita wa Uyghur in Ulugh Beg’s Zij: A Note on the Origin and Title of the Chinese Calendar Described in the Zij
Yoichi ISAHAYA
Mirzo Ulughbeg and His Contribution to the Development of the World Science, 10 Jun. 2009, English, Invited oral presentation
Samarqand, [Invited], [International presentation]

Migrating Time: The Transition of Time Conceptions by the Mongols across Thirteenth Century Eurasia
Yoichi ISAHAYA
UTCP Graduate Student Conference: The Plural Present of Historical Life, 16 May 2009, UTCP, English, Oral presentation
The University of Tokyo, [International presentation]

The Modification of the Twelve-Animal Cycle in the Timurid Period
Yoichi ISAHAYA
The Formation of Perso-Islamic Culture: The Mongol Period and Beyond, 01 Mar. 2009, English, Invited oral presentation
Tokyo University of Foreign Studies, [Invited], [International presentation]

ヒタイ暦は中央アジアの暦か？――『イルハーン天文表』に記される中国暦に関する考察――
諫早庸一
日本中央アジア学会まつざきワークショップ, 31 Mar. 2008, 日本中央アジア学会, Japanese, Oral presentation
松崎, [Domestic Conference]

中央ユーラシアを跨ぐ十二支――ティムール朝における十二支年――
諫早庸一
神戸大学史学研究会コロキウム, 06 Dec. 2006, 神戸大学史学研究会, Japanese, Oral presentation
神戸大学, [Domestic Conference]

修士論文・特定課題指導特殊演習, 2024年, 修士課程, 文学院

スラブ・ユーラシア総合研究特別演習, 2024年, 修士課程, 文学院

スラブ・ユーラシア相関研究特別演習, 2024年, 修士課程, 文学院

スラブ・ユーラシア総合研究特殊講義, 2024年, 修士課程, 文学院

Apr. 2014 - Present
The History of Science Society of Japan

Oct. 2008 - Present
Japan Association for Middle East Studies

Dec. 2007 - Present
The Japan Association for Central Asian Studies

Climate Changes, Plagues and Wars: The Crisis of the Fourteenth Century in the Afro-Eurasian Context
Grants-in-Aid for Scientific Research
Apr. 2025 - Mar. 2030
諫早 庸一; 大貫 俊夫; 市野 美夏; 四日市 康博; 水野 文月; 中塚 武; 宇野 伸浩; 佐野 雅規; 西村 陽子
本研究は、歴史学・古気候学・古遺伝学・情報学・古銭学の協働研究によって、「14世紀の危機」の全体像を解明することを目的とするものである。「14世紀の危機」とは、「中世温暖期」から「小氷期」への生態環境の移行期にあたる14世紀に起きた、1）気候変動、2）社会動乱、3）疫病流行からなる「複合危機」であり、世界史上の転換期の1つに数えられる。本研究ではこの危機を、ひろくアフロ・ユーラシア規模で考察する。文理協働研究によって、この危機をアフロ・ユーラシアの人間社会と生態環境の連環のなかで動態的に捉え、この危機が世界をいかに転換させたのか、その全体像と具体相を解明する。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Hokkaido University, 25H00476

The Governance Systems and its Resilience of European Border States during the Transition from the Middle Ages to the Early Modern Period
Grants-in-Aid for Scientific Research
Apr. 2025 - Mar. 2029
小澤 実; 纓田 宗紀; 村田 光司; 菊地 重仁; 諫早 庸一
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Rikkyo University, 25K00515

想像界の還流―境界領域における生態想像力の往還をめぐる比較文化史的研究
科学研究費助成事業
01 Apr. 2024 - 31 Mar. 2028
山中 由里子; 黒川 正剛; 安井 眞奈美; 木場 貴俊; 佐々木 聡; 黄 イク; 諫早 庸一; 中西 悠喜
日本学術振興会, 基盤研究(B), 国立民族学博物館, 24K00058

Shifting Political Centers and Water Systems: Formation and Expansion of Groups and States, and Metropolitan Areas in Afro-Eurasia
Grants-in-Aid for Scientific Research
Apr. 2023 - Mar. 2027
舩田 善之; 長峰 博之; 井黒 忍; 宮野 裕; 中村 篤志; 岩田 啓介; 中村 和之; 熊倉 和歌子; 諫早 庸一
本研究は、10世紀から20世紀初頭のアフロ・ユーラシア地域における諸集団・国家の形成と拡大の重要な要因を、政治中心の移動と首都圏に見出し、それらの類型化と比較を行う。政治中心ないし首都圏の範囲・立地と水系の関係に焦点を当てることにより、植生・環境・資源などの要素も分析対象に含めつつ、それらの歴史的展開のダイナミズムを提示する。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hiroshima University, 23H00657

Generation of Millennium Atmospheric Reanalysis Product
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (S)
Apr. 2022 - Mar. 2027
芳村 圭; 三津間 康幸; 岡崎 淳史; 庄 建治朗; 市野 美夏; 松本 淳; 八代 尚; 平野 淳平; 諫早 庸一
これまでに申請者らが開発してきた、気候代替情報と古文書天候記録で気候モデルを拘束するためのデータ同化手法を駆使し、世界初の過去1000年間の気候・気象を再現した大規模データセットを創出する。そのデータセットについて、新たな信号処理解析手法を導入し地球物理学的・歴史学的観点から十分検証した後、「過去1000年間の歴史の中で、気候・気象の変動は人間社会にどのような影響を与えてきたのか、または与えてこなかったか」という問いに対し、気候変化が社会変化に至るまでの複雑な要因や、それらの時空間影響範囲・連続性を考慮した、歴史と気候との因果関係に関する定量的な解析を行う。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (S), The University of Tokyo, 22H04938

Tree Rings, Epidemics and Bullion: The "Crisis of the Fourteenth Century" in West Asia
Grants-in-Aid for Scientific Research
2025 - 2026
諫早 庸一
本研究はモンゴル帝国（1206～1368年）の解体、特にその起点となった西アジア、フレグ・ウルス（1256～1335年）の崩壊を「14世紀の危機」の文脈で捉えようとするものである。フレグ・ウルスの崩壊はこれまで政治的な側面のみから議論されてきた。しかし文理協働研究の進展によって、1310年代から50年代にかけての西アジアは、気候変動の時代であったことが明らかになっている。こうした前提を踏まえ本研究では、気候変動に加えて、1）東アジアからの海域を通じての疫病流行、2）南アジアとの金銀交易の混乱という2つの観点からもフレグ・ウルスの崩壊を検討し、西アジアにおける1330年代の危機の実相を解明する。
Japan Society for the Promotion of Science, Fund for the Promotion of Joint International Research (Fostering Joint International Research), Hokkaido University, 24KK0217

From Endemic Diseases to Pandemics at High Latitudes in Modern Eurasia: Toward a New "Imperial Medicine"
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Apr. 2021 - Mar. 2025
宮崎 千穂; 廣川 和花; 和崎 聖日; 脇村 孝平; 畠山 禎; 飯島 渉; 諫早 庸一
本研究は、ユーラシア高緯度地帯の風土病(地域特有の疾病)に焦点を合わせつつ、主に近代における〈帝国〉が試みた医療・公衆衛生の実態の解明を目指す。
ユーラシア高緯度帯は多様な自然地理的かつ歴史・文化的諸条件を有する広大な地域である。本研究では、その各地域における風土病とそれへの〈帝国医療〉的な対応、言語・文化・歴史の多様性に由来する研究の分断を乗り超えての比較で明らかになる各風土病とそれらへの対応の連関、さらに風土病のパンデミック化の問題の解明を試みる。そしてそれらを通し、従来、低緯度帯(熱帯)を対象としてきた帝国医療研究の対象をユーラシア高緯度帯に拡張し、疾病史・医学史研究の新地平を切り拓く。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21H00500

Interdisciplinary Approach to the "Crisis of the 14th Century"
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Apr. 2021 - Mar. 2025
諫早 庸一; 大貫 俊夫; 四日市 康博; 中塚 武; 宇野 伸浩; 西村 陽子
本研究は、「14世紀の危機」に焦点を当てるものである。「14世紀の危機」とは、「中世温暖期」から「小氷期」への移行期にあたる14世紀に起きたユーラシア規模での、1）気候変動、2）社会動乱、3）疫病流行、これら3つの複合要素から成り、ユーラシア史を不可逆的に転換させた「危機」を意味する。本研究では、気候の変動は人間社会にとって特に対応の難しい20年から70年ほどの周期で「危機」を最大化するという仮説に基づいて議論を進める。100年単位の生態系の長期遷移と、社会や気候の短期のリズムとのあいだにある中間時間を、気候データと文献データとの組み合わせによって危機のサイクルとして析出する。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 21H00555

Natural Environment and the Reorganization of Political Order in Western Eurasia during the 14–17th Centuries: Rivers, Climate, and the Construction of a New Order
スラブ・ユーラシア地域 (旧ソ連・東欧) を中心とした総合的研究
Apr. 2023 - Mar. 2024
小澤実; 村田光司; 藤田風花; 伊丹聡一朗; 諫早庸一
北海道大学スラブ・ユーラシア研究センター, 「プロジェクト型」共同研究, 北海道大学スラブ・ユーラシア研究センター, Others, Competitive research funding

Maritime Networks, Islands, and Political Powers in Premodern Europe
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
Apr. 2019 - Mar. 2024
小澤 実; 鶴島 博和; 村田 光司; 四日市 康博; 松本 涼; 宮野 裕; 橋本 雄; 藤井 真生; 佐藤 公美; 菊地 重仁; 長谷川 敬; 諫早 庸一
本年度はコロナのため、代表者・分担者・協力者ともに、個人で研究目的を遂行するとともに、オンラインを活用し情報交換ならび知識の共有を図った。とりわけ、毎月開催した「海域ヨーロッパ研究会」では、科研メンバーに加え、海域史を進めている外部の研究者も招聘して議論を深めた。
代表者・分担者・協力者の報告は多岐にわたるが、特筆すべきは、第７０回日本西洋史学会大会において企画された小シンポジウム「中世北ヨーロッパにおける海域ネットワーク、島嶼、政治権力（Maritime Networks, Islands, and Political Powers in Medieval Northern Europe）」（2020年12月5日）である。科研の中間成果報告として行われた本シンポでは、４つの報告がなされた。菊地重仁「海域ネットワークの中のカロリング帝国」、ピョー トル・ステファノーヴィチ「バルト海からカスピ海・黒海へといたるルート上のスカンディナヴィア人：ルーシの出現（9－11 世紀）」、松本涼「北大西洋をこえる権力：13 世紀前半におけるアイスランド人とノルウェー商人との紛争から―」、 ルイス・シキング「中世後期の英仏海峡、北海、バルト海における島嶼、権力、海賊（の誕生）」の個別報告に対し、アルプス史と日本史を専門とする２名からコメントがなされた。このシンポジウムは本科研費の今後を規定する方向づけを行なった。
海外渡航が困難な中、分担者の松本はアイスランド大学に２ヶ月滞在し、自身の研究を進展させるとともに、現地研究者とコンタクトをとり、科研への協力も含めて関係を深めた。加えて、代表者他はオンラインによる国際会議や研究集会への参加を図るとともに、『論点・西洋史学』などに本科研での視点を反映した研究を寄稿し、学界における海域視点の共有を進展させた。
Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (A), Rikkyo University, Coinvestigator, 19H00546

Interdisciplinary Approach to the “14th Century Crisis”: The View from Northeast Asia
スラブ・ユーラシア地域 (旧ソ連・東欧) を中心とした総合的研究
Apr. 2020 - Mar. 2021
Takeshi NAKATSUKA; Nobuhiro UNO; Yasuhiro YOKKAICHI; Yoichi ISAHAYA
Slavic-Eurasian Research center, Hokkaido University, SRC Collaborative Project, Slavic-Eurasian Research center, Hokkaido University, Coinvestigator, Competitive research funding

An Analysis of Environmental History about the "14th Century Crisis"
令和元年度若手研究加速事業
Apr. 2019 - Mar. 2020
Yoichi ISAHAYA
Hokkaido University, Principal investigator, Competitive research funding

Ilkhanid Translation Project: Toward a Mesoscopic History of Mongol Eurasia
Grant-in-Aid for JSPS Fellows
Apr. 2018 - Mar. 2019
Yoichi ISAHAYA
Japan Society for the Promotion of Science, Principal investigator, Competitive research funding

Sophistication of Timekeeping in the 13th and 14th Centuries Persianate Societies
Grant-in-Aid for JSPS Fellows
Apr. 2011 - Mar. 2014
Yoichi ISAHAYA
Japan Society for the Promotion of Science, Principal investigator, Competitive research funding

Chinese Calendar in the Islamicate Astronomical Handbooks (Zījes)
The Institutional Program for Young Researcher Overseas Visits at the University of Tokyo
Sep. 2012 - Dec. 2012
Yoichi ISAHAYA
Japan Society for the Promotion of Science/The University of Tokyo, Principal investigator, Competitive research funding

Transmission of the Chinese Calendar into the Persianate World
Excellent Young Researcher Overseas Visit Program
May 2010 - Mar. 2011
Yoichi ISAHAYA
Japan Society for the Promotion of Science, Principal investigator, Competitive research funding

Transmission of the Chinese Calendar into the Persianate World
Grant-in-Aid for JSPS Fellows
Apr. 2009 - Mar. 2011
Yoichi ISAHAYA
Japan Society for the Promotion of Science, Principal investigator, Competitive research funding

気候変動・疫病・戦争：アフロ・ユーラシアからの「14世紀の危機」
27 Jun. 2025 - 27 Jun. 2025
Lecturer
北海道大学スラブ・ユーラシア研究センター
第53回スラブ・ユーラシア研究センター公開講演会
北海道大学スラブ・ユーラシア研究センター
High school students, College students, Graduate students, Teachers, Researchers, General
49954538;49336417

「14世紀の危機」――ユーラシアの四季とモンゴル帝国
22 Jan. 2025
Lecturer
山口県立西京高等学校
High school students
32428242

Silk Roads: Crossroads for Time, Space and Disciplines
21 Oct. 2024 - 11 Nov. 2024
Presenter, Editor, Lecturer, Planner
Slavic-Eurasian Research Center, Hokkaido University
2024年度公開講座
Slavic-Eurasian Research Center, Hokkaido University
High school students, College students, Graduate students, Teachers, Guardians, Researchers, General, Scientific organization, Company, Civic organization
シルクロードと聞いて、みなさんは何を思い浮かべるでしょうか。砂漠とオアシスのコントラストをゆく古代の隊商キャラバンでしょうか。莫大な資本投下のもとで敷かれた現代の鉄道なり道路でしょうか。緩やかなヨーヨー・マのチェロの音色も、急ピッチで進む一帯一路の現場で立てられる金属音もみな、シルクロード・アンサンブルの旋律の一部でしょう。ただし、今回我々が旅するシルクロードは、古代の「ロマン」や現代の「大国」に尽きるものではありません。むしろ、そのあいだに位置する６つの交差点をめぐることで、この道が何を交わらせてきたのか、線ではなく、線と線とが結ぶ点からシルクロードを考える、そんな試みをしてみたいと思います。

旅はまず、２０世紀初頭、独・露・英のシルクロード探検隊から始まります。ユーラシアの交差路で彼らが残した古写真の数々は、この道の過去と現在とを交差させるものでもあります。そしてもちろんこの交差路は時代を超えて人々が行き交う道でもありました。中国系ムスリムを中心に形成された民族集団であるドゥンガン人は、彼らの祖先がかつて来た道をさかのぼり、１９世紀後半から２０世紀中葉にかけて中央アジアへと還るのです。シルクロードが交差させているのは、空間はもちろん時間にも留まりません。この道をめぐって学問分野／ディシプリンも交差します。１４世紀中葉にヨーロッパ人口の３割を消失させたとする「黒死病」ですが、歴史学と古遺伝学の交差は、このパンデミックがシルクロードを伝ってのものだったことを示しています。そしてシルクロードは東西だけでなく南北にも伸び、この北海道を含む、北東アジアにも通じていました。放射性炭素年代測定が１５世紀初頭のものだと示した蝦夷錦は、この事実を我々に伝える確かな証拠なのです。戦後の国民的作家井上靖は、シルクロードにおける民族の興亡を描きました。１９６５年のソ連への旅において育まれた小説のなかで、滅亡した古代都市は戦後日本と交差します。こうして日本に帰ってきた我々が最後に見るのが、今年日本との国交樹立１００周年を迎えたトルコです。トルコ独立戦争のさなか、日本政府より派遣された内田定槌はシルクロードのもうひとつの端でアジアの連帯を模索するのです。

以上が、本公開講座で皆さんと訪れる６つの交差点のほんの入り口の部分です。この旅の先で、シルクロードとは何なのか、一緒に考えてみませんか。

世界史の交差点——ユーラシア史のなかのモンゴル帝国
20 Jan. 2022 - 16 Jun. 2022
Lecturer
NHK文化センター青山教室
General
【大きな転換期を迎えた世界史の交差点を、当時の史料群と共に訪れます】
本講座ではモンゴル帝国の時代のユーラシアを扱います。それは複数の歴史の交差する場所でした。モンゴル帝国はユーラシア規模に広がり、その時代にはユーラシア全体が連動していく一方、中国史、イラン史、ロシア史、中央アジア史といった地域の歴史も大きな転換期を迎えます。またモンゴルは〈移動〉の民でした。馬上からの帝国建設とはいかなるものだったのでしょうか。また彼らがユーラシアを制覇した13～14世紀は〈環境〉にとっても転換期でありました。この種の生態環境の激変は帝国にどのような影響を与えたのでしょうか。本講義では〈移動〉と〈環境〉を軸にユーラシア史のなかのモンゴル帝国を考えていきます。

ロシアと中東——「裏側」から眺める世界史
25 May 2022 - 08 Jun. 2022
Lecturer
NHK文化センター札幌教室
General
東アジアの住民であるわれわれの目下の関心は米中対立にありますが、世界を揺るがす危機は、ロシアと中東というわれわれの世界認識の裏側からもやってきます。
現在の世界が直面する難題を正しく理解し未来を展望するには、欧米を中心とする今日の世界秩序がどのようにして生成されたのか、「裏側」の人々の眼差しから反省することが不可欠です。
ロシアと中東・イスラーム世界の歴史は、これまで日本が依存してきた欧米中心の世界秩序が未曽有の危機にあるこんにち、緊要な知識となっているのです。

世界史の交差点―—ユーラシア史のなかのモンゴル帝国
14 Apr. 2021 - 29 Sep. 2021
Lecturer
NHK文化センター札幌教室
General
本講座ではモンゴル帝国の時代（1206～1368年）のユーラシアを扱います。それは複数の歴史の交差する場所でした。モンゴル帝国はユーラシア規模に広がり、その時代にはユーラシア全体が連動していく一方、中国史、イラン史、ロシア史、中央アジア史といった地域の歴史も大きな転換期を迎えます。この交差点を行き交うのは、まずは騎馬民でした。交差点を駆け抜ける自動車よろしく、モンゴルの騎馬民たちはその機動力でもってユーラシア制覇を実現します。もちろん交差点には騎馬民以外の人々もいました。歩く人々もまたこの帝国と時代とを支えていたのです。この世界史の交差点を当時の史料群とともに訪れてみるのはいかがでしょうか。

モンゴル帝国の崩壊——ユーラシアから考える〈14世紀の危機〉
25 Jun. 2021
Lecturer
北海道大学スラブ・ユーラシア研究センター
第37 回スラブ・ユーラシア研究センター公開講演会

イスラームの東と西——アラビア語文化圏とペルシア語文化圏——
23 Dec. 2020 - 10 Feb. 2021
Lecturer
NHK文化センター札幌教室
General
イスラームというと、アラビア語という言語を連想する人が多いかもしれません。確かに、アラビア語は聖典クルアーン（コーラン）の言語です。しかし、イスラーム教徒が暮らす広大な地域では実に様々な言語が用いられています。その中でも、アラビア語と並んで様々な文化活動を支えて来たのがペルシア語です。この講座では、西のアラビア語と東のペルシア語、二つの言語をとおして、イスラーム世界の歴史を考えてみたいと思います。

巨大帝国のユーラシア——モンゴルとロシア——
24 Jun. 2020 - 15 Jul. 2020
Lecturer
NHK文化センター札幌教室
General
ユーラシア大陸では巨大帝国が興亡を繰り返してきました。その中でもモンゴルとロシアは際立って巨大です。なぜそのような帝国が可能だったのでしょうか。そもそも帝国とはどのような仕組みの国家なのでしょうか。そしてなぜ帝国は崩壊してしまうのでしょうか。本講座ではこれらの問いに答えながら、ますます不安定になる現代世界に生きる私たちが歴史から何を学べるのかを一緒に考えてみたいと思います。

ユーラシア大陸、深部2000年の旅
04 Dec. 2019 - 08 Jan. 2020
Lecturer
NHK文化センター札幌教室
General

天文学史事始——13世紀イランにおける「天文対話」——
22 Jun. 2019 - 22 Jun. 2019
Lecturer
麻布高校
現在の『宇宙』研究 その地平の広がり
麻布高校
High school students

West Asia under the Mongol Rule: the History, Society and Culture
16 Nov. 2018 - 07 Dec. 2018
Lecturer
Extension Center, Waseda University
General

知られざるイスラム天文学
24 Aug. 2017 - 24 Aug. 2017
Informant
NHK
コズミック フロント☆ＮＥＸＴ

タタールのくびき
05 Sep. 2023
Other than myself
読売新聞社
読売新聞
世界史アップデート, 32428242, [Paper]

史上最大のミステリー チンギス・ハン 幻の墓を探せ！
23 Aug. 2018
NHK
私を不思議に連れてって！
NHK, [Media report]