- 2012/03 - 現在 Rikkyo University
- 2007 - 2012 Rikkyo University College of Law and Politics, Department of International Business Law Professor
- 1982 - 2007 Rikkyo University College of Law and Politics
- 1982 - 2007 Professor,Department of Law,College of Law and Politics,RIKKYO UNIVERSITY
- 2007 - - Professor,Department of International Business Law,College of Law and Politics,RIKKYO UNIVERSITY
- 1975 - 1982 Rikkyo University College of Law and Politics
- 1975 - 1982 Associate Professor,Department of Law,College of Law and Politics,RIKKYO UNIVERSITY
- 1972 - 1975 Rikkyo University College of Law and Politics
- 1972 - 1975 Lecturer,Department of Law,College of Law and Politics,RIKKYO UNIVERSITY
- 1969 - 1972 The University of Tokyo Faculty of Law
- 1969 - 1972 Full-time Research Assistant
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