- 1991 - 現在 Kumamoto Gakuen University
- 1984 - 1991 熊本商科大学 助教授
- 1984 - 1991 Kumamoto University of Commerce, Associate
- 1991 - - Kumamoto Gakuen University, Professor
- 1981 - 1984 熊本商科大学 講師
- 1981 - 1984 Kumamoto University of Commerce, Lecturer
- 1979 - 1981 Kyushu Kyoritsu University
- 1979 - 1981 Kyushu Kyoritsu University, Lecturer
- Professor
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