- 2023 - 2027 "Contracts" and "Promises": Approaches from Law and Psychology
- 2019 - 2023 贈与契約の拘束力と効力-無償契約の性質決定と契約の解釈に関する比較法的研究
- 2019 - 2023 The effects of legal socialization on people's attitudes towards contracts.
- 2016 - 2019 The relationships between expectation interest, reliance interest, and cost compensation: a comparative study of Japanese, U.S, and Germany law
- 2014 - 2018 Legal Expertise and Metacognition on Law.
- 2013 - 2016 pacta sunt servanda vs. cooling off
- 2010 - 2012 Toward the market stability for consumers
- 2007 - 2009 Competitive Order and Consumer Law
- 2005 - 2008 Collaboration of the Public and Private in forming Order to the 20013021Market/Living Environment: The Legal Structure of <<Public Sphere>>.
- 2003 - 2006 The Assignment of Receivables and Contractual Limitations on Assignment
- 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.
- 2000 - 2002 The Function and Meaning of Paradigm Theory in Jurisprudence
- 1998 - 1999 契約の拘束力の根拠に関する実証的研究-契約の性質決定についての日欧契約法の比較-
- 1995 - 1995 民法解釈学における解釈方法に関する基礎的研究-判決文に現われた法的思考と解釈論との相互関係に関する実証的研究-
- 現代契約法
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