- 2017 - 2022 The new stage of information society and the protection of rights under private law
- 2012 - 2017 Modernization of Property Rights and Reconstruction of Property Law
- 2011 - 2013 The Emergence of Common European private law and Its Impact on the Japanese Civil Code System
- 2010 - 2011 情報提供義務の日中比較研究
- 2008 - 2010 Trends of European private law and modernization of Japanese obligation law
- 2008 - 2010 International Status Quo and Problems on Unjust Enrichment Law
- 2005 - 2008 Collaboration of the Public and Private in forming Order to the 20013021Market/Living Environment: The Legal Structure of <<Public Sphere>>.
- 2005 - 2007 Developments of european uniform privat law and its influence to Japanese law
- 2004 - 2007 Modernization of Commercial Transaction Law and Reorganization of Civil Law and Commercial Law
- 2002 - 2004 European Community Law and Modernization of Private Law in EC countries
- 2002 - 2004 A Strategic Study to Replace the Current Fluid Legal System by a Better Integrated One for the 21st Century-A Comparative Study of Administration, Market, and Consumption Aspects of Modern Society.
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