- 2005 - 2014 Professor of Law, Kyushu University, Faculty of Law
- 2014 - Professor of Law, Waseda University, Faculty of Law
- 2009 - 2010 Global Research Fellow, New York University School of Law, USA (as a Fulbright Scholar)
- 2009 - 2009 Visiting Professor, Duke University School of Law, USA
- 2009 - 2009 Visiting Professor, National University of Singapore Faculty of Law, Singapore(as an ASLI Fellow)
- 2007 - 2007 Visiting Professor, University of Munich Faculty of Law, Germany
- 2003 - 2004 Associate professor of Law, Kyushu University, Faculty of Law
- 1997 - 2003 Associate professor of Law, Shiga University, Faculty of Economics
- 1999 - 2000 Visiting Scholar, Harvard Law School, USA
- 1998 - 1999 Visiting Scholar, U. C. Berkeley School of Law (Boalt Hall), USA
- 1995 - 1997 Lecturer of Law, Shiga University, Faculty of Economics