- 2023 - 2027 Analyzing the possibility of international cooperation and governance under interstate conflict
- 2018 - 2023 The Political Economy of Global Standards on Developmental Finance
- 2018 - 2022 Political Economy of Global Standards: The Case of Foreign Aid
- 2018 - 2022 The Decline and Renovation of International Institutions: Political Economic Analysis
- 2014 - 2018 Political Economy of State Policies in Changing Global Governance
- 2013 - 2016 The Economy-Security Nexus
- 2011 - 2015 Toward a theory of global public law
- 2011 - 2014 Political Economic Analysis of Coalition Formation and Institutional Building in International Governance
- 2010 - 2014 Economic Crises and Policy Regimes: The Dynamics of Policy Innovation and Paradigmatic Change
- 2008 - 2010 Analyses of Conflict and Cooperation : Integrating Theories of International Relations with Economics
- 2008 - 2010 Comparative Studies of International Conflict Resolution Mechanisms
- 2006 - 2009 Structural Reforms in Italy and Japan
- 2005 - 2009 Simulation Analysis of Global Orders based on the Concept of Global Public Goos
- 2004 - 2006 The Conditions for Multilateral Cooperation in the Asian-Pacific
- 2003 - 2004 International Institutions and Policy Cooperation between Democratic and Non-Democratic States
- 2001 - 2004 International Public Goods for Peace and Security in the post-Cold War Era : New Challenge to Construct New Order in the Global Society
- 2000 - 2001 Positive Political-Economy Analyses of the Dispute Settlement System at the World Trade Organization
- 1997 - 1998 New Electoral System and Party Realignment in Japan
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