Updated on 2025/11/19

写真a

 
OTSUKA Ryoma
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Designated Assistant Professor
Title
Designated Assistant Professor

Research Interests 7

  1. wildlife tourism

  2. gorilla

  3. バイオロギング

  4. human-wildlife interaction

  5. conservation

  6. 時系列センサデータ

  7. 行動認識

Research Areas 3

  1. Life Science / Animals: biochemistry, physiology, behavioral science

  2. Life Science / Ecology and environmental science

  3. Environmental Science/Agriculture Science / Social-ecological systems

Research History 6

  1. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences   Designated Assistant Professor

    2025.4

  2. 名古屋大学, 大学院環境学研究科   特任助教(常勤)

    2025.4

  3. Osaka University   Graduate School of Information Science and Technology Department of Multimedia Engineering

    2022.2

  4. Kyoto University   Center for African Area Studies

    2021.4 - 2022.2

  5. Kyoto University   Wildlife Research Center

    2021.4 - 2022.2

  6. Japan Society for the Promotion of Science

    2018.4 - 2021.3

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Education 3

  1. Kyoto University   Graduate School of Asian and African Area Studies

    2016.4 - 2021.3

  2. Kyoto University   Faculty of Agriculture   Faculty of Agriculture

    2012.4 - 2016.3

  3. 北海道函館中部高等学校

    2008.4 - 2011.3

Awards 4

  1. 最優秀発表賞(ポスター)

    2025.11   日本バイオロギング研究会   リアルタイム行動認識機能を備えたAIバイオロガーによる 海鳥に対する自律型音声プレイバック実験の試み

    大塚亮真

  2. The 3rd prize for oral presentation

    2019.9   Leading Graduate Program in Primatology and Wildlife Science, Kyoto University   Popularity of YouTube Contents that Violate the Tourism Regulations May Undermine Conservation of Mountain Gorillas

    Ryoma Otsuka, Gen Yamakoshi

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    Award type:Award from international society, conference, symposium, etc. 

  3. The 1st prize for poster presentation at the 11th International Symposium on Primatology and Wildlife Science

    2019.3   Leading Graduate Program in Primatology and Wildlife Science, Kyoto University   Understanding Community People's Perception of Animals Living in Protected Areas: A Case of Bwindi Impenetrable National Park, Uganda

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    Award type:Award from international society, conference, symposium, etc. 

  4. The 2nd prize for oral presentation at the 9th International Symposium on Primatology and Wildlife Science

    2018.3   Leading Graduate Program in Primatology and Wildlife Science, Kyoto University   How Can Community People Actively Participate in Community Conservation?: The Case of "Human-Gorilla Conflict Resolution Program (HUGO)" in Bwindi Impenetrable National Park, Uganda

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    Award type:Award from international society, conference, symposium, etc. 

 

Papers 13

  1. Real‐Time Behaviour Recognition on Bio‐Loggers Enables Autonomous Audio Playback Experiments in Free‐Ranging Seabirds Reviewed Open Access

    Ryoma Otsuka, Hibiki Sugiyama, Yuichi Mizutani, Ken Yoda, Takuya Maekawa

    Ecology and Evolution     2025.8

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/ece3.71832

    Open Access

  2. Exploring deep learning techniques for wild animal behaviour classification using animal‐borne accelerometers Reviewed Open Access

    Ryoma Otsuka, Naoya Yoshimura, Kei Tanigaki, Shiho Koyama, Yuichi Mizutani, Ken Yoda, Takuya Maekawa

    Methods in Ecology and Evolution     2024.2

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    Authorship:Lead author, Corresponding author   Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/2041-210X.14294

    Open Access

  3. Automatic recording of rare behaviors of wild animals using video bio-loggers with on-board light-weight outlier detector Reviewed Open Access

    Kei Tanigaki, Ryoma Otsuka, Aiyi Li, Yota Hatano, Yuanzhou Wei, Shiho Koyama, Ken Yoda, Takuya Maekawa

    PNAS Nexus     2023.12

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1093/pnasnexus/pgad447

    Open Access

  4. Haphazard Sharing of Plant Food among the Baka Hunter-Gatherers in Southeast Cameroon Reviewed Open Access

    Ayako Sekino, Ryoma Otsuka, Hirokazu Yasuoka

    African Study Monographs. Supplementary Issue.   Vol. 62   page: 81 - 103   2023.12

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  5. 教師なし学習を用いたカメラ搭載型バイオロガーの運用に関する検討

    谷垣 慶, 大塚 亮真, Li Aiyi, 波多野 遥太, Wei Yuanzhou, 小山 偲歩, 依田 憲, 前川 卓也

    第66回自動制御連合講演会     2023.10

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    Publishing type:Research paper (conference, symposium, etc.)  

    DOI: 10.11511/jacc.66.0_450

  6. Recent Trends in Sensor-based Activity Recognition

    Takuya Maekawa, Qingxin Xia, Ryoma Otsuka, Naoya Yoshimura, Kei Tanigaki

    2023 24th IEEE International Conference on Mobile Data Management (MDM)     2023.7

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    Publishing type:Research paper (international conference proceedings)   Publisher:IEEE  

    DOI: 10.1109/mdm58254.2023.00018

  7. Tourist expectations and satisfaction in mountain gorilla tourism in Bwindi Impenetrable National Park, Uganda Reviewed

    Ryoma Otsuka, Gen Yamakoshi, Gladys Kalema-Zikusoka

    Journal of Ecotourism   Vol. 22 ( 2 ) page: 1 - 10   2023.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/14724049.2023.2166056

    Web of Science

  8. Predicting bushmeat biomass from species composition captured by camera traps: Implications for locally based wildlife monitoring Reviewed Open Access

    Shun Hongo, Zeun’s C. B. Dzefack, Latar N. Vernyuy, Sosuke Minami, Kaori Mizuno, Ryoma Otsuka, Yukiko Hiroshima, Champlain Djiéto‐Lordon, Yoshihiro Nakashima, Hirokazu Yasuoka

    Journal of Applied Ecology     2022.8

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1111/1365-2664.14257

    Open Access

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/1365-2664.14257

  9. Changes in the relationship between great apes and humans: past, present and future Reviewed

    Yumi YAMANASHI, Nahoko TOKUYAMA, Yuji TAKENOSHITA, Ryoma OTSUKA, Naruki MORIMURA, Rie AKAMI

    Primate Research   Vol. 37 ( 2 ) page: 155 - 159   2021.12

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    Publishing type:Research paper (scientific journal)   Publisher:Primate Society of Japan  

    DOI: 10.2354/psj.37.046

    J-GLOBAL

  10. What is unique about the human eye? Comparative image analysis on the external eye morphology of human and nonhuman great apes Reviewed

    Fumihiro Kano, Takeshi Furuichi, Chie Hashimoto, Christopher Krupenye, Jesse G. Leinwand, Lydia M. Hopper, Christopher F. Martin, Ryoma Otsuka, Tomoyuki Tajima

    Evolution and Human Behavior   Vol. 43 ( 3 ) page: 169 - 180   2021.12

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    Publishing type:Research paper (scientific journal)   Publisher:Elsevier BV  

    DOI: 10.1016/j.evolhumbehav.2021.12.004

  11. The dispersal dilemma among female mountain gorillas: Risk infanticide and gain protection Reviewed

    Raquel Costa, Masaki Tomonaga, Ryoma Otsuka, Michael A. Huffman, Fred Bercovitch, Gladys Kalema-Zikusoka, Misato Hayashi

    African Journal of Ecology   Vol. 59 ( 1 ) page: 273 - 276   2021.3

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  12. Fermentation Ability of Gut Microbiota of Wild Japanese Macaques in the Highland and Lowland Yakushima: In Vitro Fermentation Assay and Genetic Analyses Reviewed

    Goro Hanya, Janko Tackmann, Akiko Sawada, Wanyi Lee, Sanjeeta Sharma Pokharel, Valdevino Gisele de Castro Maciel, Akito Toge, Kota Kuroki, Ryoma Otsuka, Ryoma Mabuchi, Jie Liu, Masaomi Hatakeyama, Eri Yamasaki, Christian von Mering, Rie Shimizu-Inatsugi, Takashi Hayakawa, Kentaro K. Shimizu, Kazunari Ushida

    Microbial Ecology   Vol. 80 ( 2 ) page: 459 - 474   2020.8

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    Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1007/s00248-020-01515-8

    Other Link: https://link.springer.com/article/10.1007/s00248-020-01515-8/fulltext.html

  13. Analyzing the popularity of YouTube videos that violate mountain gorilla tourism regulations Reviewed International journal Open Access

    Ryoma Otsuka, Gen Yamakoshi

    PLOS ONE   Vol. 15 ( 5 ) page: e0232085 - e0232085   2020.5

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Public Library of Science (PLoS)  

    Although ecotourism is expected to be compatible with conservation, it often imposes negative effects on wildlife. The ecotourism of endangered mountain gorillas has attracted many tourists and functioned as a key component of their conservation. There might be expectations on the part of tourists to observe or interact with gorillas in close proximity and such expectations may have been engendered by the contents of social media in this Information Age. However, the risk of disease transmission between humans and gorillas is a large concern and it is important to maintain a certain distance while observing gorillas to minimize risk. We conducted a content analysis and described the general characteristics of 282 YouTube videos related to mountain gorilla tourism. Humans and gorillas were observed simultaneously in 70% of the videos, and physical contact or close proximity within arm's reach were identified in 40%. To explore the factors affecting the number of views and likes that these videos received, we ran generalized linear mixed models and performed AIC model selection with 206 videos in which humans and gorillas were observed simultaneously. Videos obtained more views and likes when the thumbnail photos included humans and gorillas together, while videos with thumbnail photos of only gorillas did not obtain more views and likes compared with those that included no gorillas. Moreover, videos obtained more views and likes in cases where physical contact or close proximity within arm's reach with gorillas were clearly observed, compared with those that did not clearly include close human-gorilla interaction. These results suggest that human-gorilla interaction and proximity with gorillas attract more public attention than gorillas shown by themselves. Our study highlights the importance of further investigation on the direct link between such contents that violate tourism regulations and the conflicting situation.

    DOI: 10.1371/journal.pone.0232085

    Open Access

    PubMed

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MISC 2

  1. バイオロギングデバイスにおける加速度データとカメラを利用した行動目録の自動作成手法

    黒岩恒在, 大塚亮真, 谷垣 慶, 助川桃枝, 前川卓也, 原 隆浩

    情報処理学会 第82回ユビキタスコンピューティングシステム研究会     2024.5

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    Publishing type:Internal/External technical report, pre-print, etc.  

  2. A preliminary report on the association between tourism and faecal glucocorticoid metabolites concentrations in mountain gorillas in Bwindi, Uganda

    大塚亮真, 山越言, 木下こづえ

    霊長類研究   Vol. 36 ( Supplement )   2020

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Presentations 12

  1. ウガンダ共和国ブウィンディ原生国立公園におけるマウンテンゴリラの糞中グルココルチコイド濃度と観光の関係についての予備的な報告

    大塚亮真, 山越言, 木下こづえ

    第36回霊長類学会大会  2020.12.4 

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    Event date: 2020.12

    Presentation type:Poster presentation  

  2. 野生動物との近接は魅力的か?―マウンテンゴリラのエコツーリズムに関連するYouTube動画における人間とゴリラとの近接に着目して―

    大塚亮真, 山越言

    日本アフリカ学会第57回学術大会  2020.5 

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    Presentation type:Poster presentation  

  3. How Can Community People Actively Participate in Community Conservation?: The Case of "Human-Gorilla Conflict Resolution Program (HUGO)" in Bwindi Impenetrable National Park, Uganda

    Ryoma Otsuka

    The 9th International Symposium on Primatology and Wildlife Science  2018.3 

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    Presentation type:Oral presentation (general)  

  4. Popularity of YouTube Contents that Violate the Tourism Regulations May Undermine Conservation of Mountain Gorillas

    Ryoma Otsuka, Gen Yamakoshi

    The 12th International Symposium on Primatology and Wildlife Science  2019.9 

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    Presentation type:Oral presentation (general)  

  5. The Effectiveness and Challenges of Human-Gorilla Conflict Resolution Program (HUGO) In Bwindi Impenetrable National Park, Uganda

    Ryoma Otsuka

    International Symposium France-Japan Area Studies Forum  2017.12 

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    Presentation type:Poster presentation  

  6. Tourist Expectation and Satisfaction in Mountain Gorilla Tourism in Bwindi Impenetrable National Park, Uganda

    Ryoma Otsuka

    The 14th International Symposium on Primatology and Wildlife Science  2020.9 

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    Presentation type:Oral presentation (general)  

  7. Understanding Community People's Perception of Animals Living in Protected Areas: A Case of Bwindi Impenetrable National Park, Uganda

    Ryoma Otsuka

    The 11th International Symposium on Primatology and Wildlife Science  2019.3 

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    Presentation type:Poster presentation  

  8. 時系列センサデータと人工知能を用いた動物の行動認識手法とその応用について(ラウンドテーブル 人工知能 × 動物行動研究)

    大塚 亮真

    日本動物行動学会第42回大会 JES42  2023.11.3 

  9. Current Status and Issues of Community Conservation in Bwindi Impenetrable National Park, Uganda: The Case of “Human-Gorilla Conflict Resolution Program (HUGO)

    Ryoma Otsuka

    The 27th International Primatological Society Congress, Nairobi, Kenya  2018.8 

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    Presentation type:Poster presentation  

  10. A trial for wild animal behaviour classification using animal-borne accelerometers and deep learning techniques

    Ryoma Otsuka, Naoya Yoshimura, Kei Tanigaki, Shiho Koyama, Yuichi Mizutani, Ken Yoda, Takuya Maekawa

    The 8th International Bio-Logging Science Symposium  2024.3.6 

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    Presentation type:Poster presentation  

  11. Community Participation in Human-Wildlife Conflict Mitigation Program: A Case of Bwindi Impenetrable National Park, Uganda

    Ryoma Otsuka

    Area Studies and Sustainable Development Goals (SDGs)  2019.5 

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    Presentation type:Poster presentation  

  12. Crop-raiding by mountain gorillas in Bwindi Impenetrable National Park and HUGO: local countermeasure and attitudes towards the crop-raiding in Buhoma area

    Ryoma Otsuka

    The 7th International Symposium on Primatology and Wildlife Science  2017.3 

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    Presentation type:Oral presentation (general)  

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KAKENHI (Grants-in-Aid for Scientific Research) 1

  1. マウンテンゴリラの住民参加型保全とエコツーリズムの持続可能性に関する研究

    Grant number:18J22882  2018.4 - 2021.3

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    大塚 亮真

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    本研究の目的は、ウガンダ共和国ブウィンディ原生国立公園におけるマウンテンゴリラの住民参加型保全とエコツーリズムの持続可能性に関して、人とゴリラ双方の視点から総合的に理解を深め、ゴリラの保全とエコツーリズムの持続的な発展に貢献することである。この目的を達成するために、2020年度は以下の研究活動を行った。
    1. ゴリラによる作物被害に対する地域住民の認識とゴリラの作物被害の軽減を目指して20年以上活動を継続している住民参加型プログラムの現状についての論文の原稿を改稿した。
    2. 過去2年間にウガンダで採取したゴリラの新鮮な糞を用いて、糞中グルココルチコイド代謝物の濃度(ゴリラのストレスの指標)を酵素免疫測定法により測定した。この糞中グルココルチコイド代謝物濃度と、社会的、生態的、そして観光に関する要因との関係をベイズ階層モデリングにより分析した。人に慣れた群れでも過剰な観光活動によってストレスが一時的に増加する可能性が示唆された。その他の結果も合わせて論文の原稿を執筆し、投稿準備を進めた。
    3. ゴリラ観光では人とゴリラの間で病気が感染する可能性が高いため、人とゴリラは7m以上の距離を保つことがルールで定められている。しかし、ゴリラ観光に関するYouTube動画の内容を分析したところ、人とゴリラが過度に接近する動画が多く存在した。さらに、過度な接近があった動画は視聴者からより多くの反応(視聴回数や高評価数)を得ていたものが多く、人とゴリラの過度な接近映像はより多くの人の興味を惹く可能性が示唆された。本研究は2020年5月に国際誌PLOS ONEに掲載された。
    4. 観光客の期待と満足度に影響を与える要因と観光マネージメントの課題を明らかにするため、2019年度に現地調査をおこなった。2020年度はこの調査で得られたデータの解析を進め、論文の投稿準備を進めた。