- 2020 - 2025 Comparative Empirical and Public Policy Study on Civil Society and Urban Governance between Japan and Asia
- 2016 - 2021 Comparative Local Governance (State-Civil Society Relations) in Asia and Japan
- 2015 - 2019 Comparative study on legislative turnover rate
- 2010 - 2015 A Comparative and Empirical Study of the Structural Changes in Politics and Transformations in Pressure Groups, Policy Networks, and Civil Society in Japan since 2009
- 2010 - 2010 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
- 2005 - 2009 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
- 2005 - 2007 Transformation of Japanese Civil Society and the Impact to Political Process
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