- 2022 - 2026 Melting Attitudes toward Ownership: The New Framework of the Study on Attitude toward Law.
- 2018 - 2022 The study for reconstruction of the criminal responsibility of a natural and legal person and AI.
- 2017 - 2021 Lay judge system and naive legal theory
- 2016 - 2020 Legal Theory of Transnational Law: Legal Pluralism and Governance
- 2016 - 2019 An Investigation on the Dynamic Field Concept of Law
- 2016 - 2019 動態媒質論的法概念の探究
- 2014 - 2018 Legal Expertise and Metacognition on Law.
- 2011 - 2016 Interdisciplinary Study on Japan-specific Indigenous Policy as Constitutional Policy
- 2011 - 2015 From Restorative Justice in Practice to Restorative Justice as a Form of Justitia: Integrating Theoretical and Empirical Studies
- 2011 - 2014 Global Justice and Local Responsibility: Toward a Multi-Layered Theory of Legal Philosophy
- 2007 - 2010 Study on Domestic Implementation of "UN Declaration on the Rights of Indigenous Peoples"in Japan.
- 2007 - 2009 The Foundations and Frontiers of Law and Economics
- 2006 - 2009 Construction of a Reliable System in Ubiquitous Computing Societies and the Protection of Privacy : an Approach by Legal Analysis and Information Technology.
- 2005 - 2009 法のクレオールと主体的法形成の研究
- 2005 - 2008 Collaboration of the Public and Private in forming Order to the 20013021Market/Living Environment: The Legal Structure of <<Public Sphere>>.
- 2003 - 2005 Retributive Justice Meets Restorative Justice : Interdisciplinary Approach towards Criminal Justice and Theory of Justice Compounded
- 2002 - 2004 The Creole of Culture and the Structuration of Law---the Exploration and Furtherance of "Comparative Legal Formation"---
- 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 - 2004 地球温暖化問題を巡る世代間衡平性と負担原則
- 2002 - 2003 The Light and Shadow of 21st Century Family Model: The Reconstruction of Family Law System
- 2001 - 2003 Innovation of Information Technology and the Principles of Cyber Law Age---Legal and Technological Perspectives---
- 2000 - 2001 The Construction of the Legal System for Supporting Autonomy
- 1999 - 2000 Responsibility of the Organization and Responsibility of its Individual Members : Approaches from Social Psychology, Philosophy of Law and Economics, and their Integration
- 1999 - 2000 How are Rights to Culture to be Realized? -Between Liberal Theories of Justice and the Protection of Indegenous People-
- 1997 - 1998 To What Extent Is Affirmative Action Necessary? -The Significance and Limits of Equality Claims-
- 1996 - 1998 An Economic Analysis of Inheritance System : From a Perspective of Law and Public Choice Theory
- 1997 - 1997 法的知識の一般的構造の解明
- 1996 - 1996 「差異への権利」はどこまで認められるか? -多文化時代の法秩序を求めて-
- 1996 - 1996 法解釈の深層論理-法律エキスパートシステムの洗練のために-
- 1995 - 1995 差別的表現はどこまで規制されるべきか?-現代社会における自由と平等の境界をめぐって-
- 1993 - 1995 Planning of Deterrence-system of Unlawful Conducts and Behaviors by Corporations --An Approach by Law and Economics--
- 1994 - 1994 法的推論における解釈のシステム化
- 1993 - 1993 現代社会における公正の理念とその射程
- 1993 - 1993 法的推論における解釈のシステム化
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