- 1997 - 2004 Okayama Shoka University
- 1997 - 2004 Assistant professor, Okayama Shoka University
- 2004 - - 岡山商科大学 教授
- 2004 - - Professor, Okayama Shoka University
- 1991 - 1997 Toho University
- 1989 - 1997 Kanto Gakuin University
- 1989 - 1997 Part-time Lecture, Kanto Gakuin University
- 1993 - 1996 The Open University of Japan
- 1993 - 1996 Part-time Lecture, The University of the Air
- Part-time Lecture, The Toho University
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