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KAWAMATA Hiroshi

Education and Research Center for Mathematical and Data Science　Practical Education Program DivisionSpecially Appointed Associate Professor

Researcher basic information

■ Degree
  • Dr. Sc., Tohoku University
■ URL
researchmap URLホームページURL■ Various IDs
ORCID IDJ-Global ID■ Research Keywords and Fields
Research Keyword
  • biological macromolecule
  • reaction dynamics
  • terahertz
  • millimeter wave
  • nano particle
  • permittivity
  • transmission electron microscopy
  • spectroscopy
Research Field
  • Natural Science, Space and planetary sciences
  • Humanities & Social Sciences, Science education
  • Nanotechnology/Materials, Nanostructural physics
  • Nanotechnology/Materials, Fundamental physical chemistry
  • Natural Science, Biophysics, chemical physics and soft matter physics

Career

■ Career
Career
  • Apr. 2024 - Present
    Hokkaido University, MDSC, Associate Professor
  • Apr. 2023 - Mar. 2024
    Hokkaido University, IAGE, Associate Professor
  • Apr. 2020 - Mar. 2023
    Osaka University, CHEGA, Assistant Professor
  • Oct. 2019 - Apr. 2020
    Hokkaido University, ILTS, Reaerch Fellow
  • Apr. 2019 - Sep. 2019
    Hokkaido University, ILTS, Technical Assistant
  • Apr. 2018 - Aug. 2018
    Hokkaido University, Faculty of Science, Posdoc Fellow
  • Nov. 2016 - Mar. 2018
    Hokkaido University, IAHE, Assistant Professor
  • Feb. 2013 - Oct. 2016
    Hokkaido University, Faculty of Science, Posdoc Fellow
  • Dec. 2010 - Jan. 2013
    RIKEN, ASI Researcher
  • Apr. 2006 - Sep. 2010
    IAMS (Taiwan), Posdoc Fellow
  • Apr. 2003 - Mar. 2006
    RIKEN, Special Posdoc Researcher
  • Apr. 1997 - Sep. 1999
    Canon Inc., 平塚デバイス開発センター
Educational Background
  • 1999 - 2003, Tohoku University, Dr.Sc., 理学研究科, Dept. of Chemistry
  • 1995 - 1997, Keio University, M.Sc., 理工学研究科, Dept. of Chemistry
  • 1991 - 1995, Keio University, B.Sc., 理工学部, Dept. of Chemistry

Research activity information

■ Papers
■ Lectures, oral presentations, etc.
  • Photofragment imaging of oriented methyl/ethyl bromide (CH3Br, C2H5Br) for the assessment of their transition dipole moments
    H. Kawamata; M. Nakamura; D.-C. Che
    The 41th Symposium on Chemical Kinetics and Dynamics, Jun. 2026, English, Poster presentation
  • SO2 advection height from Forest Fires Using Satellite Imagery
    N.Ohshima; H.Tokuue; S. Jouko; K. Yoshikawa; A. Hashimoto; M. Shibata; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2026, May 2026, English, Poster presentation
  • Photofragment imaging of oriented alkyl bromides (CH3Br, C2H5Br) for evaluating their transition dipole moments
    H. Kawamata; M. Nakamura; D.-C. Che
    The 19th Anuual Meeting of Japan Society for Molecular Science, Sep. 2025, Japanese, Poster presentation
  • Photofragment imaging of oriented alkyl bromides (CH3Br, C2H5Br) for evaluating their transition dipole moments
    H. Kawamata; M. Nakamura; D.-C. Che
    ISBM 2025, The 31st International Symposium on Molecular Beams, Jun. 2025, English, Poster presentation
  • Photofragment imaging of oriented methyl/ethyl bromide (CH3Br, C2H5Br) for discovering their transition dipole moments
    H. Kawamata; M. Nakamura; D.-C. Che
    The 40th Symposium on Chemical Kinetics and Dynamics, Jun. 2025, English, Poster presentation
  • Spatiotemporal Analysis of SO2 Distribution from Forest Fires Using Satellite Imagery
    N.Ohshima; H.Tokuue; K. Yoshikawa; A. Hashimoto; M. Shibata; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2025, May 2025, English, Oral presentation
  • Concerted stereodynamics: branching selectivity in photodissociations
    D.-C. Che; H. Kawamata; M. Nakamura; T. Kasai
    Stereodynamics 2024, Aug. 2024, English, Invited oral presentation
    Cardiff, United Kingdom, [Invited], [International presentation]
  • Photofragment imaging of oriented methyl halide (CH3X, X=I/Br) for examining the direction of its transition dipole moment
    H. Kawamata; D.-C. Che; M. Nakamura; T. Kasai
    The 39th Symposium on Chemical Kinetics and Dynamics, Jun. 2024, English, Poster presentation
  • Forecasting glacier lake outbursts days in advance using upstream glacier surface temperature
    A.Takahashi; H.Tokuue; K. Matsuzaki; A. Hashimoto; R. Katada; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2024, May 2024, English, Poster presentation
  • Photodissociation imaging study of halothane (CF3CHBrCl) at 206/234 nm (2-color) and 234 nm (1-color)
    H. Kawamata; D.-C. Che; M. Nakamura; T. Kasai
    The 17th Anuual Meeting of Japan Society for Molecular Science, Sep. 2023, Japanese, Poster presentation
  • Photofragment imaging of oriented χ-isohaloethane (CF2ClCHFI): the revealed secondary pathways and vector-correlated dipole moment
    H. Kawamata; D.-C. Che; M. Nakamura; T. Kasai
    The 38th Symposium on Chemical Kinetics and Dynamics, Jun. 2023, English, Poster presentation
  • Photofragment imaging of oriented 1-chloro-2-iodo-1,1,2-trifluoroethane (CClF2CHFI) correlated with laser polarization
    H. Kawamata; D.-C. Che; M. Nakamura; T. Kasai; K.-C. Lin
    The 37th Symposium on Chemical Kinetics and Dynamics, Jun. 2022, English, Poster presentation
  • Photofragment imaging of oriented isohaloethane (CBrF2CHClF) correlated with laser polarization
    H. Kawamata; D.-C. Che; M. Nakamura; T. Kasai; K.-C. Lin
    The 36th Symposium on Chemical Kinetics and Dynamics, Jun. 2021, English, Oral presentation
  • Wakame (Undaria pinnatifida) areas mapping using satellite remote sensing
    R. Takayanagi; A. Shimizu; T. Sugawara; N. Inoue; K. Yamazaki; Deepak H V; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2018, May 2018
  • Correlation analysis between salmon farming and red tide distributions in inland sea of Chiloe Island, Chile mapped out by remote sensing
    S. Yoshino; R. Yamashita; K. Nagao; K. Murahashi; A. Roshanianafard; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2018, May 2018
  • Identification of wakame (Undaria pinnatifida) living in the seawater based on the spectral reflectance measurements for satellite remote sensing
    K. Asako; T. Wataru; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2018, May 2018
  • Estimation of tidal area changes in Bangladesh using satellite images
    M. Miyazaki; K. Negoro; S. Hata; L. Lahrita; L. Végh; K. Yamawaki; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU 2018, May 2018
  • Remote sensing reveals curious pattern of cryoconite
    D. Yamaga; A. Yasumoto; N. Takeuchi; S. Sugiyama; Y. Takahashi; N. Naruse; H. Kawamata; D. Sakakibara; M. Minowa
    International Symposium on Cryosphere and Biosphere, Mar. 2018
  • Investigation for annual route changes of reindeer migration in Siberia using satellite remote sensing
    G. Suzuki; T. Sakka; T. Tashiro; H. Kawamata; S. Tatsuzawa; N. Naruse; Y. Takahashi
    ISAR-5, Jan. 2018
  • Research for annual travel-route changes of reindeer living around the Arctic Circle using satellite remote sensing
    G. Suzuki; T. Sakka; T. Tashiro; H. Kawamata; S. Tatsuzawa; N. Naruse; Y. Takahashi
    AGU Fall meeting 2017, Dec. 2017
  • Remote estimation of crown size and tree density in snowy areas
    R. Kishi; A. Ito; K. Kamada; T. Fukita; H. Kawamata; N. Naruse; L. Lahrita; Y. Kawase; K. Murahashi; Y. Takahashi
    AGU Fall meeting 2017, Dec. 2017
  • Mapping of colored-snow area on glaciers by using spectral reflectance of algae
    D. Yamaga; A. Yasumoto; S. Hatakeyama; Y. Hasegawa; M. Imai; A. Bilesan; H. Kawamata; M. Terasima; S. Sugiyama; N. Takeuchi; N. Naruse; Y. Takahashi
    AGU Fall meeting 2017, Dec. 2017
  • See the picture of the cryoconite distribution from satellites
    A. Yasumoto; D. Yamaga; M. Imai; A. Bilesan; H. Kawamata; N. Naruse; Y. Takahashi; N. Takeuchi; S. Sugiyama
    EMS annual meeting 2017, Sep. 2017
  • Measurements of clouds using 3D models generated from images captured with uncalibrated cameras
    M. Shimono; K. Hirata; K. Murahashi; A. Purwanto; H. Kawamata; N. Naruse; Y. Takahashi
    EMS annual meeting 2017, Sep. 2017
  • The method for identification of the cryoconite distribution by using satellite image
    A. Yasumoto; D. Yamaga; M. Imai; H. Kawamata; N. Naruse; Y. Takahashi; A. Bilesan; N. Takeuchi
    JpGU-AGU joint meeting 2017, May 2017
  • High-level science education and research activity program for high school student using video conference system with PC chat
    N. Naruse; H. Kawamata; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Research for annual travel-route changes of reindeer living around the Arctic Circle using satellite remote sensing
    G. Suzuki; T. Sakka; T. Tashiro; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • A new fire risk indicator for Indonesia
    H. Asahi; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Seeking the distribution of cryoconites using satellite images
    D. Yamaga; A. Yasumoto; M. Imai; H. Kawamata; N. Naruse; Y. Takahashi; A. Bilesan; N. Takeuchi
    JpGU-AGU joint meeting 2017, May 2017
  • Revaluation with Landsat 8 of red snow mapping in ice field
    S. Hatakeyama; K. Hasegawa; T. Tashiro; X. Li; A. Roshanianafard; H. Kawamata; N. Naruse; N. Takeuchi; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Evaluation of covered area with tree in forest using satellite remote sensing
    A. Ito; T. Fukita; R. Kiski; K Kamada; K. Murahashi; Y. Kawase; L. Lahrita; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Analysis of optimal conditions for photo-based 3D modeling of cloud-like objects
    M. Shimono; K. Hirata; A. Purwanto; K. Murahashi; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Cloud observation by 3D modeling based on camera Images
    K. Hirata; M. Shimono; K. Murahashi; A. Purwanto; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Performance evaluation of low-cost poor-visibility meter for hyper-densely observation of blowing snow
    Y. Kobayashi; K. Watanabe; H. Kawamata; N. Naruse; M. Nemoto; K. Nishimura; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Development for polarization monitoring method of black ice area on roads
    M. Ikeda; R. Kamada; Y. Kawase; K. Murahashi; L. Lahrita; H. Kawamata; N. Naruse; Y. Takahashi
    JpGU-AGU joint meeting 2017, May 2017
  • Liquid structure and molecular dynamics of collagen aqueous solution
    H. Kawamata; S. Kuwaki; T. Ikoma; J. Tanaka; R. Nozaki
    JPS 2017(72nd) annual meeting, Mar. 2017
  • Structure and viscosity of collagen aqueous solution probed with dielectric dispersions
    H. Kawamat; S. Kuwak; T. Ikoma; J. Tanaka; T. Mishina; R. Nozaki
    JPS 2016 autumn meeting, Sep. 2016
  • Dielectric study on polypeptide structure in aqueous solution: hydration and entangled network
    H. Kawamata; S. Kuwaki; K. Urasawa; M. Mizuno; T. Mishina; T. Ikoma; J. Tanaka; R. Nozaki
    The 3rd International Life-Science Symposium, Nov. 2015
  • Broadband dielectric relaxation of collagen aqueous solution
    H. Kawamata; S. Kuwaki; K. Urasawa; M. Mizuno; T. Mishina; T. Ikoma; J. Tanaka; R. Nozaki
    The 37th Symposium on Solution Chemistry of Japan, Nov. 2014
  • Broadband dielectric relaxation of the aqueous solution of tilapia and sturgeon collagen
    H. Kawamata; S. Kuwaki; M. Mizuno; K. Urasawa; T. Mishina; T. Ikoma; J. Tanaka; X. Zhang; S. Adachi; K. Ura; N. Azuma; Y. Takagi; R. Nozaki
    BSJ2014, Sep. 2014
  • Broadband (500MHz-2.5THz) dielectric spectroscopy of collagen-in-water mixtures
    H. Kawamata; S. Kuwaki; K. Urasawa; M. Mizuno; T. Mishina; T. Ikoma; J. Tanaka; R. Nozaki
    JPS 2014 autumn meeting, Sep. 2014
  • Anharmonicity of LO & TO phonons with different lifetimes observed in THz bandn
    H. Kawamata; H. Minamide
    JPS 2013(68th) annual meeting, Mar. 2013
  • Uncovering the “missing" 411 band from the overlapped CH3 (000) REMPI band in Cl + CH4 (v3=1) → HCl + CH3
    H. Kawamata; K. Liu
    The 26th Symposium on Chemical Kinetics and Dynamics, Jun. 2010
  • Mode-selective formation of vibrationally excited products in the early barrier F + CH4 (v3=1) reaction
    H. Kawamata; W.Q. Zhang; K. Liu
    2009 Annual Meeting Chemical Society Located in Taipei, Dec. 2009
  • Excited State Dynamics in X + CH4 (v3=1) → HX + CH3 (X=Cl, F)
    H. Kawamata; K. Liu
    The 25th Symposium on Chemical Kinetics and Dynamics, Jun. 2009
  • State-to-state Chemistry in Cl + CH4 (v3=1) → HCl + CH3
    H Kawamata; S. C. Tauro; K. Liu
    The 24th Symposium on Chemical Kinetics and Dynamics, Jun. 2008
  • State-to-state Chemistry in Cl + CH4 (v3=1) → HCl + CH3
    H. Kawamata; S. C. Tauro; B. Zhang; K. Liu
    Trends in Chemical Dynamics: from Small molecules to Biomolecules, Dec. 2006
  • Vibrational spectroscopy of hydrated cluster anions
    H. Kawamata; T. Maeyama; N. Mikami
    Pacifichem 2000, Dec. 2000
■ Affiliated academic society
  • THE PHYSICAL SOCIETY OF JAPAN
  • THE JAPANESE SOCIETY FOR PLANETARY SCIENCES
■ Research Themes
  • Development of new gas analyzer using differential pressure measurement system and its application to biogas analysis
    Grants-in-Aid for Scientific Research
    30 Jun. 2022 - 31 Mar. 2025
    蔡 徳七; 川俣 大志
    本研究は極微量分子の定量分析を目指した新規ガス分析装置を開発することを目的としている。開発装置を用いてヒトが発する呼気を分析し、呼気中に含まれる各種分子の濃度分布を計測する。その濃度分布と疾病・疾患との相関を調べることで新規医療診断機器の開発を目指すものである。
    測定原理は、ガスを封入したセルに赤外光レーザー光を照射し、分子が光を吸収した場合の系内の微弱な圧力変化を、微差圧計測系で観測するものである。前年度に開発した計測装置を用いてシクロヘキサン（50ppm）及びアセトアルデヒド（100ppm）の赤外吸収スペクトルの計測に成功した。同様にアンモニア（100ppm）濃度のガス分析に成功し赤外吸収スペクトルを決定した。
    計測装置の感度向上を目指し、赤外レーザー光の強度依存性と出力信号強度の関係を調べたところ明確な比例関係が見られた。これは計測が一光子過程で進んでいることを示しており、本研究手法が有意に計測できていることを示している。一方で、レーザー光を反射ミラーを用いて多重反射させたところ、反射回数に比例して信号強度が上昇することが示された。これは高精度多重反射ミラーを設置し計測すれば計測感度を飛躍的に向上できることを示すものであり、今後、装置の改良を進める計画である。
    一方で、本計測手法に関する理論計算を実施した。その結果、実験値は理論値に比べ2桁程度低い値となった。これは熱伝搬による影響が大きく関係していることを示しており、今後、セルの形状や温度制御等の改良により計測感度が飛躍的に向上できることを示唆している。
    Japan Society for the Promotion of Science, Grant-in-Aid for Challenging Research (Exploratory), Osaka University, 22K19047
  • Development of dual 1.3 µm CW lasers for differential frequency generating THz-wave
    Sakura program
    Apr. 2012 - Mar. 2014
    Hiroaki MINAMIDE
    JSPS, Competitive research funding
  • 水素結合性芳香族分子クラスター負イオンの振動分光
    科学研究費助成事業
    2001 - 2003
    川俣 大志
    芳香族分子は水などの極性溶媒による溶媒和によって初めて負イオンとして存在することができるものが多く、その電荷分布と負電荷を保持するための水素結合ネットワーク構造に関して多くの興味が持たれている。そこで本年度も引き続き、芳香族分子-水クラスター負イオンの振動分光法を開発することを目的とした。そして、ベンゾニトリル-水から成る系に適用し、幾何構造および電荷分布の決定を試みた。
    振動分光に用いる赤外光、つまり3μm帯の発生には、2台のレーザーを組み合わせた差周波発生法を利用しているが、用いる波長によって赤外光への変換効率が違ってくる。また、負イオンの生成量は中性クラスターの場合と比較して非常に少ないために、より高強度な赤外光源が必要であった。したがって、今回の開発では、Nd^+:YAGレーザーの基本波(1064nm)と色素レーザー(757-810nm)とを組み合わせることで、従来の約2倍の赤外光強度を達成した。
    実際に適用したベンゾニトリル-水クラスター負イオンBnt(H_2O)_1^-について、振動スペクトルから以下のことがわかった。1)水分子のFree OHおよびニトリル基へのイオン性σ-水素結合に帰属されるバンドが現れた。後者はO-H変角振動の倍音とのフェルミ共鳴によって、バンドが2本に分裂し、その強度は前者の約3倍以上であった。2)ベンゼン環のC-H伸縮振動の相対強度は、Free OHとイオン性σ-水素結合OH振動の中間であり、中性および正イオンクラスターの傾向と大きく異なる。光電子分光の結果と併せると、水分子がC-N三重結合と同軸上に位置する幾何構造が支持され、余剰電荷はニトリル基の窒素原子に局在していると結論した。
    日本学術振興会, 特別研究員奨励費, 東北大学, 01J08152
■ Academic and Social Contribution Activities/Other
Others
  • Mar. 2017 - Mar. 2017
    Dropbox Business at Hokudai SSP
    (only Japanese) https://navi.dropbox.jp/biz/casestudy/hokudai-ssp/