- 2021 - 2025 社会保障と私的扶養の交錯と現代的課題
- 2019 - 2024 Multi-layered Structure of Global, National and Local Laws and their Coordination
- 2019 - 2023 住民基本台帳制度の検討を通じた住民概念の構築と動揺に関する研究
- 2018 - 2023 資源の有限性をめぐる法学的考察--「事業としての行政」法理論の可能性
- 2016 - 2021 Interdisciplinary research on laws regarding support of persons in need.
- 2017 - 2020 Legal Approaches to the Medical and Care Service Delivery System as a Network
- 2016 - 2019 Overcoming Population Decline, Earthquake Recovery and Vitalizing Local Economy
- 2014 - 2018 Research on the Codification of Administrative Law
- 2014 - 2017 Intersections between the national government, local governments and various autonomous entities in the health care system
- 2014 - 2017 Land,Electoral System,Autonomy : Rebuiding Representaive Democracy
- 2013 - 2017 Defining inhabitants--local democracy and standing
- 2012 - 2015 Large-scale Disasters and Legal Issues
- 2011 - 2015 A Paradigm Conversion of the Japanese Local Government Law System
- 2011 - 2014 Functional Autonomy (Funktionale Selbstverwaltung) and Local Autonomy (Kommunale Selbstverwaltung)
- 2010 - 2014 Administrative Law in the Multiplicity of Actors
- 2010 - 2012 Defining Decentralization and Cooperation in Local Autonomy
- 2008 - 2009 Defining Democracy in Local Autonomy Law
- 2006 - 2009 Study on Public Governance from the Point of View of Public Law
- 2004 - 2006 Research on Laws of Measures for dealing with Disasters
- 2004 - 2005 フランス地方自治制度の研究-2003年憲法改正の意義-
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