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Gomi Shintaro

Faculty of Fisheries Sciences　Marine Bioresource and Environmental Science　Fisheries EngineeringAssistant Professor

Researcher basic information

■ URL
researchmap URLホームページURL■ Various IDs
J-Global ID■ Educational Organization

Career

■ Career
Career
  • Apr. 2025 - Present
    北海道大学大学院水産科学研究院, 海洋生物資源科学部門 水産工学分野, 助教
  • Apr. 2021 - Mar. 2025
    水産研究・教育機構, 水産資源研究所 水産資源研究センター 底魚資源部, 研究員

Research activity information

■ Papers
  • Long-term changes of the community structure of demersal fish species in the East China Sea and Yellow Sea
    Takahito Masubuchi; Takeshi Sakai; Mari Yoda; Shintaro Gomi; Tomoaki Iseki; Seiji Ohshimo
    Fisheries Science, Springer Science and Business Media LLC, 28 Mar. 2026, [Peer-reviewed], [International Magazine]
    Scientific journal, Abstract

    This study provides the first comprehensive long-term analysis of demersal fish community structure in the East China and Yellow seas using Japanese bottom trawl fishery data spanning four decades (1982–2023). Using nonparametric multidimensional scaling, we identified five distinct fish assemblages with spatial segregation patterns that changed significantly over time.Fish communities showed progressive spatial shifts, with clusters dominated by economically valuable species such as flatfishes and Japanese common squid in the Yellow Sea, and large Sciaenidae and conger pike along coastal China, undergoing substantial range contractions during the 1980s–1990s due to intensive fishing pressure. Sequential changes in target species were observed as fishing pressure transitioned from high-value species to alternatives including largehead hairtail, cuttlefish, and swordtip squid following initial species declines. Japanese fishing grounds reduced to waters near Japan after the mid-1990s due to international fishery agreements, coinciding with community structure changes. Current Japanese operations target yellow and red seabreams with stable catches under reduced fishing effort. This analysis demonstrates that fishing pressure and fleet redistribution due to international agreements considerably influenced demersal fish community dynamics. Future research requires multinational collaboration integrating data from China, the Republic of Korea, and Japan for comprehensive regional assessment of transboundary marine ecosystem changes.
  • Stability Assessment of a Submersible Net Cage with Vertical Buoyancy Columns Under Steady Currents
    Kengo Yaegashi; Kewen Wang; Shintaro Gomi; Tsutomu Takagi
    Fishes, 03 Feb. 2026, [Peer-reviewed], [International Magazine]
    English, Scientific journal, Offshore aquaculture requires net cages that remain stable under strong currents and during submersion and emergence operations. In this study, we proposed a submersible net cage structure equipped with vertical buoyancy columns as an alternative to the conventional horizontal floating-frame cage and evaluated its stability using a net geometry and load analysis system (NaLA system). Model-scale cages were tested in a recirculating flume tank at two current velocities, and the three-dimensional cage geometry was reconstructed using the multicamera through direct linear transformation method to validate the simulated cage inclination. The NaLA system accurately reproduced the measured geometry and time-varying inclination. After validation, stability was compared over a range of current velocities by tracking the cage inclination during the emergence phase. When mooring lines were attached to the top of the cage, the conventional floating-frame cage exhibited a smaller inclination than the buoyancy-column cage. However, relocating the mooring attachment point on the columns significantly improved the stability; attaching the moorings near the bottom of the columns generated the smallest final inclination and yielded a higher stability than the conventional cage. The buoyancy columns can outperform those of conventional designs when paired with an appropriate mooring configuration, thus offering a promising structure for applications under harsh offshore conditions.
  • Horizontal distribution and abundance of red seabream (Pagrus major) in the East China Sea and Sea of Japan based on standardized catch per unit effort
    Seiji Ohshimo; Takahito Masubuchi; Shintaro Gomi; Takeshi Sakai; Tomoaki Iseki
    REGIONAL STUDIES IN MARINE SCIENCE, 91, 20 Dec. 2025, [Peer-reviewed], [International Magazine]
    English, Scientific journal
  • Estimation of isoscapes, trophic positions, and trophic niches of demersal fishes and squids in the East China Sea inferred from stable isotope ratios
    Shintaro Gomi; Takeshi Sakai; Takahito Masubuchi; Tomoaki Iseki; Seiji Ohshimo
    REGIONAL STUDIES IN MARINE SCIENCE, 89, 10 Dec. 2025, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    English, Scientific journal
  • 以西底びき網漁業におけるマトウダイ，カイワリ，キダイの水揚げ体長に基づく非水揚げ量とYPRの推定
    遼太郎 津村; 正 東海; 大輔 塩出; 猛 酒井; 伸太郎 五味; 真里 依田
    日本水産工学会誌, 2025, [Peer-reviewed], [Domestic magazines]
    Japanese, Scientific journal
  • Estimating the Purse Seine Net Geometry during a Hauling Operation Using a Data Assimilation Method
    Shintaro Gomi; Tsutomu Takagi; Katsuya Suzuki; Tatsuki Oshima; Shoko Wada; Rika Shiraki; Yoshihiro Nishiyama; Ichiya Ogino
    Fishes, 9, 10, Oct. 2024, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    Scientific journal
  • Adjustment of Parameters for Numerical Simulation of Fishing Net Dynamics Using a Data Assimilation Method
    Shintaro Gomi; Tsutomu Takagi; Katsuya Suzuki; Tatsuki Oshima; Shoko Wada; Rika Shiraki; Ichiya Ogino; Shigeru Asaumi
    International Journal of Offshore and Polar Engineering, 34, 3, 299, 305, Sep. 2024, [Peer-reviewed], [Lead author, Corresponding author], [International Magazine]
    Scientific journal
  • Reduction of fuel consumption through combined implementation of drag reduction techniques on bottom trawl nets
    GOMI SHINTARO; MATSUSHITA YOSHIKI; SAKAI TAKESHI; MIZOGUCHI HIROYASU
    NIPPON SUISAN GAKKAISHI, 90, 3, 212, 219, The Japanese Society of Fisheries Science, 15 May 2024, [Lead author, Corresponding author], [Domestic magazines]
    Japanese
  • Estimating trophic guilds based on isotopic niches of demersal fishes, squids and crustaceans in the East China Sea
    Yohei Kawauchi; Takeshi Sakai; Mari Yoda; Aigo Takeshige; Takahito Masubuchi; Shintaro Gomi
    Marine and Freshwater Research, 74, 6, 544, 561, 2023, [Peer-reviewed], [International Magazine]
    Scientific journal
  • Controlling a Fishing Net Geometry Underwater Using a Data Assimilation Method
    Shintaro Gomi; Tsutomu Takagi; Katsuya Suzuki; Rika Shiraki; Ichiya Ogino; Shigeru Asaumi
    Applied Ocean Research, 106, Jan. 2021, [Peer-reviewed], [Lead author], [International Magazine]
    Scientific journal
■ Other Activities and Achievements
■ Affiliated academic society
  • 日本水産工学会
  • 日本水産学会
■ Research Themes
  • Mechanisms of Long-Distance Migration in Migratory Fish Species
    Grants-in-Aid for Scientific Research
    01 Apr. 2025 - 31 Mar. 2029
    高木 力; 五味 伸太郎; 菊地 謙次; 竹原 幸生
    Japan Society for the Promotion of Science, Grant-in-Aid for Scientific Research (B), Hokkaido University, 25K01181
  • レジリエントな柔構造係留漁具の開発に向けた基礎研究
    科学研究費助成事業
    Apr. 2026 - Mar. 2029
    日本学術振興会, 若手研究, Principal investigator
  • 底びき網の非着底操業を実現するワープ長モデル予測深度制御（MPC）の開発
    2026年度研究開発助成
    Apr. 2026 - Mar. 2028
    一般財団法人アズビル山武財団, Principal investigator
  • ネスティング技術を用いた噴火湾沿岸の海洋構造可視化
    学術研究支援事業
    Apr. 2026 - Mar. 2027
    公益財団法人南北海道学術振興財団, 若手研究者支援枠
  • 不定形な網状柔軟構造物の動態を自在に制御する状態制御技術の確立とその応用
    科学研究費助成事業
    24 Apr. 2020 - 31 Mar. 2022
    五味 伸太郎
    本研究は，網状柔軟構造物の動態制御システムをまき網漁具へ適用し，柔軟構造物の水中動態制御技術の実用化を図ることを目的とする。データ同化手法を用いて制御に必要なパラメータを推定し，柔軟構造物の動態を制御するという申請者らが提案したアルゴリズムのもと，網状構造物の形状制御を世界的に主要な網漁具であるまき網漁具に応用し，短時間で大変形する動態の制御を実現する。当該年度は制御を実施するにあたり網動態の再現精度向上のためのシステム構築を主に行った。実施した内容については以下の通りである。
    １）旋網漁具は短時間で網形状が大変形することから，漁具動態の計算に用いるための流体力係数の導出が難しい。漁具に作用する一般的な流体力計算では網形状が定常状態時における流体力係数が用いられるが，形状が大変形する旋網漁具では実際の状態を反映していない可能性がある。また，船の動きが急激に変化する旋網操業では，流体力の導出に必要な，正確な潮流ベクトルの取得も困難である。そこで，網動態制御と同様のアルゴリズムを適用することより，算定結果が実際の網動態と同じ様になるために必要な潮流ベクトルを推定するシステムの構築を行った。
    ２）実操業データを計算条件として，構築した再現精度向上システムが網動態の算定結果を実操業中の網動態へと近付けるような潮流ベクトルを推定可能かどうか，試行実験を行ったところ，算定結果が実際の網動態に近づくような潮流ベクトルが推定できることを確認した。また，網動態の再現精度が向上するとともに，制御アルゴリズムの動作を実際の操業データを用いて確認できた。
    日本学術振興会, 特別研究員奨励費, 北海道大学, 20J11404
■ Industrial Property Rights