- 2019 - 2023 憲法秩序の領域分化をめぐる法的論証作法の日独比較
- 2017 - 2021 comparative studies of public Laws with historical contexts in the era of globalization
- 2015 - 2019 Reformation of the fundamental structure of the judiciary through publication and participation.
- 2015 - 2018 Establishment of a new human rights protection system at an interface between internationalization of constitutional law and constitutionalization of international law
- 2015 - 2018 Broadcast Law and Internet Law in the Era of Next-generation Broadcasting
- 2012 - 2015 Toward a Conceptualization on Structure of Constitutionalization of European Regional Order through an Analysis of Implementation of the Human Rights Convention
- 2012 - 2015 Freedom of Speech and Broadcasting in the Era of Full-Digitization
- 2011 - 2015 Empirical and Comparative Study on Revitalization of Judicial Review
- 2009 - 2012 The Reception and Developments of Western Constitutional Theory in Asia : the Comparative Research of Japanese and Taiwanese Constitutional Law
- 2009 - 2011 Broadcasting Law and Telecommunication Law in the Digital Era
- 2008 - 2011 Study of normative power of the constitution-examination by means of the discourse between constitutional law studies and other legal and social sciences
- 2008 - 2010 A Review of the Principle of a "Public Trial" During the Period of Judicial Reform?Toward an Explanation in the Relationship Between System and Human Rights.
- 2008 - 2010 Harmonization and its Limits of the Human Rights Norms in Europe
- 2006 - 2008 Broadcasting Law in the Digital Era
- 2004 - 2006 Secondary Stage of IT Revolution and the Legal System
- 2004 - 2005 General study of the regional protection of th international human rights--in the focus of the European Convention of Human Rights and its Court
- 2001 - 2003 The Impact of IT Revolution and Legal System
- 1998 - 2001 Reconstruction of Libel Doctrine
- 1998 - 2000 Legal Institution of Multimedia
- 1997 - 1998 「科学技術・環境・人間」に関する日独共同研究のための企画調査
- 1993 - 1993 電波ボーダーレス時代における放送の法的規制
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