研究者基本情報

氏名

• 氏名

  Kentaro YAMAMOTO

ホームページ・researchmap等のリンク

• ホームページ・researchmap等のリンク

  ホームページのリンク

所属・職名

• Department of Law, Professor

学歴

• Apr. 2004, Mar. 2007, The University of Tokyo, Graduate School of Arts and Sciences, Graduate Dept. of Advanced Social and International Studies
• Apr. 2002, Mar. 2004, The University of Tokyo, Graduate School of Arts and Sciences, Graduate Dept. of Advanced Social and International Studies
• Apr. 1998, Mar. 2002, The University of Tokyo, Faculty of Economics, Department of Economics

学位

• 27 Feb. 2009, 博士（学術）, 東京大学, 法学関係, 博総合第855号, 政治家の政党移動と政党政治の変化：日本における『政界再編』とは何であったか
• Mar. 2004, 修士（学術）, 東京大学
• Mar. 2002, 学士（経済学）, 東京大学

職歴

• Apr. 2025, Kokugakuin University, Faculty of Law Department of Law, Professor
• Sep. 2023, Mar. 2025, Tenshi College
• Apr. 2019, Mar. 2025, Hokkai-Gakuen University, The Department of Law, Professor
• Apr. 2024, Sep. 2024, Sapporo University
• Jun. 2022, Jun. 2023, Harvard University, Weatherhead Center for International Affairs, Program on US-Japan Relations, Academic Associate
• Apr. 2015, Mar. 2019, Hokkai-Gakuen University, The Deoartment of Law, Associate Professor
• Apr. 2013, Mar. 2015, Hokkai-Gakuen University, The Department of Law, Lecturer
• Apr. 2011, Mar. 2013, Japan Society for the Promotion of Science, Postdoctoral Research Fellowship
• Aug. 2011, Aug. 2012, New York University, Visiting Scholar
• Aug. 2011, Aug. 2011, Hokkai-Gakuen University, The Department of Law
• Apr. 2007, Mar. 2011, The University of Tokyo, Research Center for Advanced Science and Technology, Researcher

本学就任年月日

• 01 Apr. 2025

研究分野

• Party System
• Party Realignment in Japan
• Japanese Politics

研究活動

論文

• Party switching and policy disagreement: scaling analysis of experts' judgment, Hiroki Kubo; Tomoko Matsumoto; Kentaro Yamamoto, Japanese Journal of Political Science, 23, 3, 254, 269, 21 Jul. 2022, Cambridge University Press (CUP), Abstract Under what conditions do policy disagreements cause parties to split? Before the general elections in 2017 in Japan, the Minshin, the largest opposition party, split, and the major opposition camp collapsed into three parties. Disagreement about defense policy was rapidly politicized by the founding leader of a new party, Hope. Some members were motivated to switch to Hope and split the Minshin. Why did the disagreement about defense policy, which had long existed but was inactive, become an issue that led to a major split? To answer these questions, we used Aldrich–Mckelvey and Blackbox transpose scalings to analyze the data from an expert survey about issue positions and the salience of party policies. The variance in experts' responses was also examined to consider whether parties consistently and clearly distinguish their policy positions. Party positions on defense policy were clearly distinguished and revealed a split among splinter parties. However, the party positions clearly converged on the environment, decentralization, and other policies in a two-dimensional space, which indicated the unity of the major opposition camp. Moreover, different item functioning (DIF) analysis revealed a high variance (i.e., negative weight) on the issue salience of defense policy, which indicated its politicization immediately before the split. Overall results indicated that the politicization of defense policy contributed to weakening party cohesion and the party was split over disagreement about it. This implies that party switching is caused by policy disagreement but also hinges critically on which policy is politicized as an issue for party unity.

  DOI
• Why the Japanese Party System change?, Kentaro Yamamoto, The Annuals of Japanese Political Science Association, 72, 1, 1_15, 1_39, 2021, Japanese Political Science Association

  DOI
• 465, 491, Mar. 2015
• 50, 2, 339, 363, Sep. 2014
• Feb. 2009
• 40, 49, Mar. 2008
• 61, 69, Mar. 2006
• 14, 156, 165, Mar. 2005
• 107, 119, Mar. 2005

Misc

• 12 Apr. 2025

  関連URL
• 30, 31, Mar. 2025
• Oct. 2024

  関連URL
• 81, 8, 9, Aug. 2024
• 30, 31, Feb. 2024
• 3615, Nov. 2023
• 90, 97, Sep. 2023
• 52, 59, Aug. 2023
• 647, 33, 36, Dec. 2022
• 643, 20, 21, Aug. 2022
• 128, 135, Jan. 2022
• 433, 437, Dec. 2021
• 213, 235, Oct. 2021
• 36, 2, 188, 190, Dec. 2020
• 55, 12, 13, May 2020
• 142, 149, May 2019
• 49, 6, 7, Apr. 2019
• 109, 19, 23, May 2018
• 571, 6, 7, Aug. 2016
• 557, 4, 5, Jun. 2015

著書等出版物

• 29 Jan. 2025
• May 2023
• 13 Dec. 2022
• 20 Sep. 2022
• Jul. 2021
• 12 Mar. 2020
• Dec. 2014
• 09 Mar. 2012
• Sep. 2010
• 22 Dec. 2009
• Political parties and legislative party switching, Heller, William B.; Mershon, Carol, Palgrave Macmillan, 14 Jul. 2009
• Jul. 2008

講演・発表

• 05 Nov. 2024
• 18 May 2024
• 05 Mar. 2024
• 25 Nov. 2023
• 26 Sep. 2020
• 06 Oct. 2019
• 29 Aug. 2019
• 06 Apr. 2019
• Dec. 2017
• 24 Sep. 2017
• Jul. 2017
• 21 May 2017
• Oct. 2016
• 25 Jun. 2016
• Jun. 2015
• Jan. 2014
• 13 Jun. 2009
• 関連URL

競争的資金

• 23730131
• 11J08426
• 19530100, Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Geometric Modeling Analysis of Political (Dis)similarity Judgments, This study has analyzed the political (dis)similarity judgment data using the geometric modeling in cognitive psychology and provided a perspective to analyze the cognition of political differences in the spatial modeling of politics. At the same time, this new perspective has enabled us to revise and broaden the existing theory of party coalition that is focused either on office-seeking or policy-seeking.
• 225141
• 23730131

学外活動

学外委員等活動

• Jun. 2024, 9999, 公益財団法人明るい選挙推進協会, 評議員
• Oct. 2023, 9999, 日本政治学会, 年報編集委員
• Sep. 2023, Sep. 2025, 日本公共政策学会, 学術委員
• Sep. 2016, Mar. 2025, 北海道明るい選挙推進協議会, 会長
• Sep. 2014, Mar. 2025, 北海道明るい選挙推進協議会, 委員
• Oct. 2023, Oct. 2024, 日本政治学会, 企画委員
• Jun. 2018, Jun. 2023, 日本公共政策学会, 理事
• Oct. 2021, Oct. 2022, 日本政治学会, 書評委員
• Oct. 2019, Jun. 2020, 日本政治学会, 年報編集委員
• Jun. 2016, May 2017, 日本選挙学会, 企画委員