- 1996 - 2001 Hakuoh University, Assistant Professor
- 1996 - 2001 Hakuoh University
- 1994 - 2001 Kokugakuin University, Part-time instructor
- 1994 - 2001 国学院大学 非常勤講師
- 2001 - - Hakuoh University, Professor
- 2001 - - 白鴎大学 教授
- 1991 - 1996 Hakuoh University, Instructor
- 1991 - 1996 Hakuoh University
- 1989 - 1991 Rikkyo University, Research Assistant
- 1989 - 1991 Rikkyo University
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