- 2004 - 2008 : Specially Appointed Professor, University of Tokyo, 21st Century Center of Excellence Program on Soft Law;
- 2004 - 2005 : Visiting Professor of Law, Waseda University, Law School, teaching Private International Law, International Civil Procedure and International Trade Law (until 2005);
- 2005 - : Professor of Law, Waseda University, Law School
- 1996 - 2004 : Professor of Law, University of Tokyo, Faculty of Law, teaching International Civil Procedure and International Trade Law
- 2004 - : Special Counsel, Nagashima Ohno & Tsunematsu Law Office
- 2004 - : Special Counsel, Nagashima Ohno & Tsunematsu Law Office
- 1991 - 1996 : Associate Professor of Law, University of Tokyo, Faculty of Law, teaching International Civil Procedure and International Trade Law
- 1984 - 1991 : Associate Professor of Law, University of Tokyo, College of Arts and Sciences
- 1988 - 1989 (): Visiting Scholar, Columbia University, School of Law
- 1987 - 1988 (): Visiting Scholar, University of Michigan, Law School
- 1983 - 1984 : Research Assistant, Meiji University, Faculty of Law
- 1982 - (-1984): Ministry of Foreign Affairs, Headquarters of Law of the Sea
- 1978 - 1981 : Research Assistant, University of Tokyo, Faculty of Law
- 1978 - : B.A., University of Tokyo, Faculty of Law