- 2017/04/01 - 現在 Kokushikan University Faculty of Letters, Department of Literature
- 2009/03 - 現在 学校法人国士舘 常任理事
- 2002 - 現在 Professor
- 2004/04/01 - 2017/03/31 Kokushikan University Faculty of Letters, Department of Literature
- 2003/06 - 2009/03 Head
- 2003/05 - 2009/03 Manager(Dean)
- 1992/04/01 - 2004/03/31 Kokushikan University Faculty of Letters, Department of Literature
- 1988 - 2001 Lecturer
- 1988 - 2001 Professor
- 1988 - 2001 Associate Professor
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