- 2002 - - 筑波大学 非常勤講師
- 2002 - - Tsukuba University, Part-time Lecturer
- 1996 - 1998 Waseda University
- 1996 - 1998 Waseda University, Part-time Lecturer
- 1988 - 1993 Rissho University
- 1988 - 1993 Rissho University, Part-time Lecturer
- 1990 - 1992 Waseda University
- 1990 - 1992 Waseda University, Part-time Lecturer
- 1989 - 1991 日本学術振興会 特別研究員
- 1989 - 1991 Japan Society for the Promotion of Science,
- 1986 - 1988 Waseda University
- 1986 - 1988 Waseda University, Research Assistant
- Postdoctoral Fellow
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