- 2021 - 2025 医療制度史の政策過程アプローチ:1950~60年代の医療提供体制問題に着目して
- 2020 - 2023 中道左派政党の国際比較
- 2019 - 2022 Public Pension Reform and Institutional Reformation for De-destitution among the elderly
- 2018 - 2021 ポスト55年体制における圧力団体・農協の政治活動の内在的・総体的把握
- 2014 - 2017 保守政党の国際比較
- 2013 - 2015 De-destitution for Elder and Policy making in Public Pension
- 2012 - 2014 The arguments of Japanese constitution for 1960's-mainly local papers
- 2011 - 2014 Social Democracy in the Postwar Japanese Party Politics: The Challenges of the Democratic Socialist Party, 1960-1971
- 2010 - 2013 Changes in Welfare-employment Regime and their Impact on Group Politics in Japan
- 2010 - 2012 Urban Social Structure and Sightseeing
- 2010 - 2012 The quantitative, historical, and comparative analysis on pension systems for de-destitution.
- 2008 - 2009 Politics, bureaucracy, and social security in the years of high economic growth.
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