- 1992 - 現在 創価大学大学院法学研究科博士後期課程教授(併任)
- 1984 - 現在 Soka University Faculty of Law
- 2004 - 2008 創価大学大学院法務研究科(法科大学院)教授(兼属)
- 1986 - 1992 創価大学大学院法学研究科博士前期課程教授(併任)
- 1986 - 1987 National Tax Administration Agency
- 1986 - - Soka University Graduate School, Professor
- 1982 - 1984 Okinawa Kokusai University, Professor
- 1982 - 1984 Okinawa International University College of Law
- 1984 - - Soka University, Professor
- 1980 - 1982 Okinawa International University Institute of Ryukyuan Culture
- 1973 - 1982 Okinawa, Kokusai University, Assistant Professor
- 1973 - 1982 Okinawa International University College of Law
- 1972 - 1973 Okinawa Kokusai University, Lecturer
- 1972 - 1973 University of the Ryukyus
- 1972 - 1973 Okinawa International University College of Law
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