Organization
School of Environment and Society Associate Professor
Title
Associate Professor
External link
KOTANI HITOMU
Papers
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Emotional responses and perceptions of false alarms in flood warnings and their impact on evacuation action: an empirical analysis of the Kyushu Region, Japan
Mai Watanabe, Hitomu Kotani, Ryota Yagi, Yohei Sawada, Takuya Kawabata
Journal of the Meteorological Society of Japan 2026.8
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Does flood early warning performance affect flood damage? Evidence from the 2018 Japan Floods
Hitomu Kotani, Wataru Ogawa, Kakuya Matsushima
2026.3
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Cry wolf effect in flood early warning
Yohei Sawada, Ryota Yagi, Takuya Kawabata, Hitomu Kotani
2026
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Media coverage of Muslim communities’ disaster-related activities in Japan: A content analysis of four national newspapers, 1991–2021
Hitomu Kotani, Hirofumi Okai
2026
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Inclusive Mass Fatality Management And Planning In Cremation-Dominant Societies: Policy Challenges And Recommendations From Japan
Hitomu Kotani, Hirofumi Okai, Susumu Nejima, Maki Yamagata, Yuichi Sato, Naoki Maeno
2026
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Diagnosing spatiotemporal characteristics in flood warning false alarms in Japan
Sultana Rajia, Hitomu Kotani, Mai Watanabe
2026
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Causal Effects of Perceived False Alarm Ratio on Flood Protective Actions during Heavy Rain Warnings in Japan: A Case Study of Tropical Storm Yun-Yeung in 2023
Hiraku Matsuda, Hitomu Kotani, Masamitsu Onishi
Weather, Climate, and Society 2025.10
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Using electric vehicles to power houses or travel during blackouts triggered by natural hazards: A choice experiment in Japan
Shota Yamazaki, Hitomu Kotani, Kazuyoshi Nakano, Kakuya Matsushima
Energy and Buildings 2025.9
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Overview of the natural hazard exposure of mosques in Japan
Hitomu Kotani, Seiya Hyodo, Hirofumi Okai
Natural Hazards 2025.9
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The Effect of Pay-It-Forward During Disasters on Social Networks: A Network Approach
Riku Tanimoto, Hitomu Kotani
Journal of Disaster Research 2025.6
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Hitomu KOTANI, Wataru OGAWA, Kakuya MATSUSHIMA
Journal of the Meteorological Society of Japan. Ser. II 2025
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Initial Responses of Mosques in Ishikawa and Toyama after the 2024 Noto Peninsula Earthquake, Japan
Hitomu Kotani, Hirofumi Okai, Susumu Nejima, Mari Tamura
Journal of Disaster Research 2024.12
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Modeling the Dynamics of Social Preparedness with Regional Interactions to Explore Efficient Flood Early Warning Systems
Hitomu Kotani, Wataru Ogawa, Kakuya Matsushima, Junichi Susaki, Yohei Sawada
Weather, Climate, and Society 2024.10
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Activities and roles of mosques in Japan after the recent major earthquakes: A comprehensive study
Kotani, H., Okai, H., Tamura, M.
Progress in Disaster Science 20 2023
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Purchase decision process and information acquisition of zero-energy houses in Japan
Kotani, H., Nakano, K.
Journal of Asian Architecture and Building Engineering 22 ( 2 ) 2023
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Mosque as a COVID-19 Vaccination Site in Collaboration with a Private Clinic: A Short Report from Osaka, Japan
Mari Tamura, Hitomu Kotani, Yusuke Katsura, Hirofumi Okai
2022
Research Projects
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Mass fatality management in Japan, a country with the highest cremation rate: a survey focusing on inclusiveness in death
Grant number：25K21916 2025.6 - 2028.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）
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Theoretical and empirical analysis on cry wolf effects in flood prediction: Challenge for the design of flood early warning system
Grant number：22K18822 2022.6 - 2025.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)
Grant amount：\6370000 （ Direct Cost: \4900000 、 Indirect Cost：\1470000 ）
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Roles of mosques during disasters in Japan: interdisciplinary approaches
Grant number：22H01611 2022.4 - 2026.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Grant amount：\10140000 （ Direct Cost: \7800000 、 Indirect Cost：\2340000 ）
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Roles of mosques during disasters in Japan: interdisciplinary approaches
Grant number：23K22881 2022.4 - 2026.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Grant amount：\10140000 （ Direct Cost: \7800000 、 Indirect Cost：\2340000 ）
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ベイジアンＳＥＭによる質的・量的情報の統合とその小規模コミュニティ調査への適用
Grant number：21K18743 2021.7 - 2023.3
日本学術振興会 科学研究費助成事業 挑戦的研究(萌芽)
本田 利器, 小谷 仁務, 田中 尚人
Grant amount：\5330000 （ Direct Cost: \4100000 、 Indirect Cost：\1230000 ）
本研究では，小規模コミュニティのようにデータ数が多くできない事例において，構造方程式モデリング(SEM)を適用できるようにするため，量的情報と質的情報を統合した分析を可能とする枠組みを構築するため，ベイズ理論を適用して定式化されたベイジアン SEMを利用する手法を提案する．
初年度は，事前情報として与える条件の妥当性やその効果を定量的に計測するため，研究代表者の保有する既存の調査データを用いて，WAIC(Watanabe Akaike Information Criteria)およびWBIC(Watanabe Bayes Information Criteria)の適用性について検証した．算出手法やその精度，解析の安定性等についての知見を得るとともに，課題も明確にした．既往の事例においては，通常のSEMを用いた従来の検討では適切な解析が行えなかった複雑な構造を想定した分析に適用し，ベイジアンSEMを用いて事前情報を反映させることで同様の分析が実施可能となることを示した．また，技術普及が進みつつあり，サンプルを多く収集するのが難しいフェーズに対し，ベイジアンSEMを適用して技術普及メカニズムを分析した．
また，実事例において適用するため，海外における地震により被災したコミュニティ（COVID-19が問題となっていない地域を選定）の復旧に関する情報を収集し，また，アンケート調査を実施した．質的にも量的にも十分なデータを得たと考えている．一方，国内の事例としては，熊本地震からの復興まちづくりや地方創生について，コロナ禍であることから文献調査などを中心に活動を行った．当該事例については今後調査を実施する予定である． -
Social Network Analysis of Knowledge Transfer with a Focus on Context and Physical Environment
Grant number：18K13845 2018.4 - 2022.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
Kotani Hitomu
Grant amount：\4290000 （ Direct Cost: \3300000 、 Indirect Cost：\990000 ）
Public infrastructure (physical environment) can be a location of festivals and community events, and these events can form connections between local residents. Further, these connections can contribute to disaster prevention and recovery. In this research project, we developed theoretical and empirical models and analyzed (1) the process of social network formation in the presence of public infrastructure, (2) the process of network formation and knowledge transfer, and (3) the effect of knowledge and information transferred on reconstruction and disaster prevention. We presented frameworks that can analyze the effect of the form of infrastructure on social network formation and appropriate information provision in terms of the context between senders and receivers.