- 2003 - 2004 Meikai University
- 2004 - - 関東学院大学法科大学院 教授
- 1997 - 2003 Meikai University
- 1998 - - 東京農業大学 非常勤講師
- 1998 - - 慶應義塾大学 非常勤講師
- 1998 - - Tokyo University of Agriculture, Assistant
- 1998 - - Keiogijuku University, Assistant
- 1993 - 1997 Meikai University
- 1993 - 1997 Meikai University, Assistant
- 1992 - 1993 Miyazaki Sangyo Keiei University
- 1992 - 1993 Miyazaki Sangyo Keiei University, Assistant
- 1989 - 1992 Miyazaki Sangyo Keiei University
- 1989 - 1992 Miyazaki Sangyo Keiei University, Assistant
- Professor
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