- 2022 - 2025 ドイツのグリーン・リカバリーと日本の気候保護政策の比較事例研究
- 2017 - 2020 リアル市民社会とデモクラシーの関係性に関するドイツと日本の比較事例研究
- 2014 - 2017 エネルギー転換のドイツ・モデルと日本におけるエネルギー政策転換のための事例研究
- 2012 - 2015 「再国民化」の比較政治学-ヨーロッパ・デモクラシーのジレンマ
- 2010 - 2014 Changes in Welfare-employment Regime and their Impact on Group Politics in Japan
- 2010 - 2014 政治構造変動と圧力団体、政策ネットワーク、市民社会の変容に関する比較実証研究
- 2010 - 2013 Nonprofit Organizations and Advocacy in Japan
- 2006 - 2012 A Study of Ideas and Institutional Frameworks of Democracy That Support Environmental Governance
- 2008 - 2011 An International Comparison of Next Generation Human Resource Development on Welfare Society and Policy Design
- 2007 - 2009 Social Exclusion-Inclusion and Activities of Civil Society after 9. 11. Comparative study of Western countries and USA
- 2006 - 2009 Comparative research about the citizens municipality and the network of the nonprofit organizations in Japan and Germany
- 2006 - 2009 Comparative Analysis of Reform Politics in the Conservative Regimes
- 2004 - 2005 Transformation of European Civil Society under Globalization and Europeanization
- 2002 - 2004 Systematic Comparative Study of Public Policies and Policy Processes in Japan and Korea
- 2000 - 2002 Research of government policy of Schroeder coalition government in Germany
- 1998 - 2001 Comparative Political Analysis on Global Environmental Network in Western and Asian Countries
- 1997 - 1999 Empirical Analysis of Global Environmental Policy Networks in Japan, the United States, Germany and Korea in the Comparative Political Perspective
- 1997 - 1999 RESEARCH ON THE JAPAN-EU POLITICAL RELATIONS
- 1996 - 1998 The Integrated Environmental Policy in Germany and Japan
- 1995 - 1997 Comparative Analysis of Environmental Policy Network in Japan, USA, Germany and Korea
- 1992 - 1993 EC Integration and European politics
- 日本・韓国の政治体制と公共政策に関する体系的比較のための企画調査
- 公共・市場・NPOの相互関係とその政策形成へ及ぼす影響に関する国際比較研究
- A Comprehensive Empirical Study on the Three-Level Civil Society Structure and Governance in Japan, South Korea, the United States, Germany, and China in Comparative Perspective
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日本社会政策学会
, 日本EU学会
, 日本ドイツ学会
, 日本国際政治学会
, 社会政策学会
, 日本政治学会
, 日本公共政策学会(Public Policy Studies Associations, Japan)
, 日本比較政治学会(Japan Association for Comparative Politics)