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Affiliation |
Faculty of Urban Innovation, Division of Urban Innovation |
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Job Title |
Associate Professor |
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Related SDGs |
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KAMAHARA Yuta
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The Best Research Achievement in Research Career 【 display / non-display 】
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【Published Thesis】 Environmental protection after civil war: A difference-in-geographic-discontinuity approach(Journal of Peace Research) 2025.04
【Published Thesis】 A Uunified approach to measuring unequal representation 2024
【Published Thesis】 Apportionment and the Population Figure: A Case Study on the 2016 Electoral Reform in Japan(Japanese Journal of Electoral Studies) 2023.12
The Best Research Achievement in the last 5 years 【 display / non-display 】
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【Published Thesis】 Environmental protection after civil war: A difference-in-geographic-discontinuity approach(Journal of Peace Research) 2025.04
【Published Thesis】 A unified approach to measuring unequal representation 2024.10
【Published Thesis】 Apportionment and the Population Figure: A Case Study on the 2016 Electoral Reform in Japan(Japanese Journal of Electoral Studies) 2023.12
【Published Thesis】 Malapportionment in Space and Time: Decompose It!(Electoral Studies) 2021.06
Education 【 display / non-display 】
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-2012.3
Keio University Doctor Course Accomplished credits for doctoral program
Campus Career 【 display / non-display 】
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2018.4
Duty Yokohama National UniversityFaculty of Urban Innovation Division of Urban Innovation Associate Professor
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2017.4-2018.3
Duty Yokohama National UniversityFaculty of Urban Innovation Division of Urban Innovation Lecturer
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2016.4-2017.3
Duty Yokohama National UniversityCollege of Education and Human Sciences Lecturer
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2015.4-2016.3
Duty Yokohama National UniversityFaculty of Urban Innovation Division of Urban Innovation Lecturer
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2014.4-2015.3
Duty Yokohama National UniversityCollege of Education and Human Sciences Lecturer
Academic Society Affiliations 【 display / non-display 】
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2010.3
Midwest Political Science Association
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2007.10
American Political Science Association
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2007.10
Japanese Political Science Association
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2007.7
Japan Public Choice Society
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2007.5
Japanese Association of Electoral Studies
Books 【 display / non-display 】
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比較政治学事典
日本比較政治学会（ Role： Contributor , 民主主義指標）
丸善出版 （ ISBN:9784621309995 ）
Total pages：726 Responsible for pages：180-181 Language：Japanese Book type：Dictionary, encyclopedia
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都市科学事典
鎌原勇太（ Role： Contributor , 2-1-10. 空間とデータ分析）
春風社 （ ISBN:9784861107344 ）
Language：Japanese Book type：Dictionary, encyclopedia
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基礎ゼミ政治学
福井英次郎（ Role： Contributor , 民主主義にはどのような制度があるのか？執政府-立法府関係と一票の格差）
世界思想社 （ ISBN:9784790717249 ）
Total pages：192 Responsible for pages：94-104 Language：Japanese Book type：Textbook, survey, introduction
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Beyond the Gender Gap in Japan
Yoshiaki KOBAYASASHI, Yuta KAMAHARA（ Role： Contributor）
University of Michigan Press （ ISBN:978-0472131143 ）
Responsible for pages：247-264 Language：English Book type：Scholarly book
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Building Inclusive Democracies in ASEAN
（ Role： Contributor , Legislative Malapportionment in Asia）
Anvil Publishing Inc. （ ISBN:9789712731723 ）
Language：English Book type：Scholarly book
Papers 【 display / non-display 】
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Environmental protection after civil war: A difference-in-geographic-discontinuity approach
Kyosuke Kikuta, Yuta Kamahara
Journal of Peace Research 62 ( 3 ) 738 - 752 2025.4 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Joint Work
Other Link： https://journals.sagepub.com/doi/10.1177/00223433241249329
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A unified approach to measuring unequal representation
Junichiro Wada and Yuta Kamahara
Public Choice 201 ( 1-2 ) 287 - 308 2024.10 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Single Work
Other Link： https://link.springer.com/article/10.1007/s11127-024-01159-z
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Malapportionment in Space and Time: Decompose It!
Yuta Kamahara, Junichiro Wada, Yuko Kasuya
Electoral Studies 71 102301 2021.6 [Reviewed]
DOI Web of Science CiNii Research
Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER Joint Work
Existing studies on legislative malapportionment often conceptualize and measure this phenomenon with little regard to intertemporal variations and the malapportionment-generating process (MGP). Our conceptualization leads us to introduce a measure called alpha-divergence that can identify the vote inequality derived from various stages of MGP. Using an originally created database that covers 440 elections in 112 countries, we decompose the overall degree of malapportionment into three stages: malapportionment that arises at the stages of interstate apportionment, intrastate districting, and allotment of seats to special districts. We also provide analyses that can decompose the demographic and political factors contributing to the trends of the overall degree of malapportionment for selected countries.
Other Link： https://www.sciencedirect.com/science/article/pii/S0261379421000226
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Apportionment and the Population Figure: A Case Study on the 2016 Electoral Reform in Japan
Yuta KAMAHARA, Junichiro Wada
Japanese Journal of Electoral Studies 39 ( 1 ) 107 - 121 2023.12 [Reviewed]
Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal) Single Work
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Studying malapportionment using α-divergence
Junichiro WADA, Yuta KAMAHARA
Mathematical Social Sciences 93 77 - 89 2018.5 [Reviewed]
Language：English Publishing type：Research paper (scientific journal) Publisher：ELSEVIER Joint Work
Other Link： https://www.sciencedirect.com/science/article/pii/S0165489618300155?via%3Dihub
Review Papers 【 display / non-display 】
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書評「坂井亮太著『民主主義を数理で擁護する』」
鎌原勇太
週刊読書人 2022.7
Language：Japanese Publishing type：Book review, literature introduction, etc. Single Work
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書評 Washida, Hidekuni（鷲田任邦）. Distributive Politics in Malaysia: Maintaining Authoritarian Party Dominance
鎌原勇太
公共選択 ( 76 ) 128 - 131 2021.7
Language：Japanese Publishing type：Book review, literature introduction, etc. Single Work
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書評「大村華子著『日本のマクロ政体―現代日本における政治代表の動態分析―』」
公共選択 ( 58 ) 127 - 129 2012.10
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal) Single Work
Awards 【 display / non-display 】
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2023年度日本選挙学会賞（優秀論文）
2024.5 日本選挙学会
Individual or group name of awards：鎌原勇太・和田淳一郎
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Presentation Award for Graduate Students (Japan Public Choice Society)
2010.6
Grant-in-Aid for Scientific Research 【 display / non-display 】
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選択権者理論の実証分析―非選出議席は権力維持に寄与するのか？ 研究課題
Grant number：21K01319 2021.4 - 2025.3
Grant-in-Aid for Scientific Research(C)
Authorship：Principal investigator Grant type：Competitive
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Grant number：17K17730 2017.4 - 2020.3
Grant-in-Aid for Young Scientists(B)
Authorship：Principal investigator Grant type：Competitive
Presentations 【 display / non-display 】
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今井真士
2024年度日本選挙学会研究会 2024.5 日本選挙学会
Event date： 2024.5
Language：Japanese Presentation type：Oral presentation (general)
Venue：高知工科大学・高知県立大学永国寺キャンパス Country：Japan
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和田淳一郎
2022年度日本選挙学会研究会 2022.5 日本選挙学会
Event date： 2022.5
Language：Japanese Presentation type：Oral presentation (general)
Venue：石川県文教会館・金沢商工会議所会館 Country：Japan
Charge of on-campus class subject 【 display / non-display 】
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2025 Research Methodology Studio A
Graduate School of Urban Innovation
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2025 Senior Thesis / Projects B
College of Urban Sciences
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2025 Senior Thesis / Projects A
College of Urban Sciences
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2025 Senior Seminar B
College of Urban Sciences
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2025 Senior Seminar A
College of Urban Sciences
Committee Memberships 【 display / non-display 】
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Japanese Association of Electoral Studies
2018.5 - 2024.5
Committee type：Academic society
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The Japan Publc Choice Society
2012.4
Committee type：Academic society
Social Contribution(Extension lecture) 【 display / non-display 】
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保土ヶ谷区・旭区・瀬谷区合同統計調査員事務研修会「ニュースにだまされない『統計の基礎知識』を学ぼう」
Role(s)： Lecturer
保土ヶ谷区・旭区・瀬谷区 横浜市保土ヶ谷区公会堂 2018.8
Audience： Government agency
Type：Other
Media Coverage 【 display / non-display 】
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朝日新聞GLOBE 6月号Re：search「票の重み」を考える―「一人一票、一回だけ投票の日本はガラパゴス？
朝日新聞GLOBE 6月号 2016.6
Academic Activities 【 display / non-display 】
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日本選挙学会2022年度年報編集委員
Role(s)： Planning, management, etc.
2021.3 - 2023.3
Type：Academic society, research group, etc.