- 2003/09/01 - 現在 Tamagawa Academy
- 2003/04/01 - 現在 Tamagawa Academy
- 2000/04/01 - 2004/03/31 Tamagawa Academy
- 1993/04/01 - 2003/03/31 Tamagawa Academy
- 1994/04/01 - 2000/03/31 Tamagawa Academy
- 1993/11/01 - 1994/03/31 Tamagawa Academy
- 1986/04/01 - 1993/03/31 Tamagawa Academy
- 1981/04/01 - 1986/03/31 Tamagawa Academy
- 1975/04/01 - 1981/03/31 Tamagawa Academy
- Tamagawa University College of Engineering, Department of Management Science Professor
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