- 2023 - 2027 審議と代表・立法・統制-議会の正統性の再定位
- 2020 - 2023 議会制と対抗権力ー議会制の代表・統制メカニズムに関する歴史的・比較憲法的研究
- 2020 - 2023 比較憲法論の世界的多様化時代における日本憲法研究の国際的再定位に関する総合的研究
- 2017 - 2022 International Comparison of Japanese Constitutional Studies
- 2017 - 2020 Comparative Studies on "the Parliamennt and theTime"
- 2013 - 2016 A study of the intersection of "a dynamic theory" and "a normative theory" about the bicameral system
- 2013 - 2016 The State of Studies of Japanese Constitution in the U.S. and Europe
- 2012 - 2015 Sexual Business and Legal Order
- 2009 - 2014 The study on bicameral system from a point of view of the comparative legislative process
- 2009 - 2010 Legislators and Congress as Constitutional Interpreters
- 2005 - 2008 The Comparative and Synthetic Study of New Legislation Trends andPlural Legislation Processes in the Changing Era
- 2004 - 2005 国会議員の身分の憲法的保障のあり方と現代議会制-日仏の議員特権の比較憲法的考察-
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