- 1977 - 1992 Tokyo Metropolitan University
- 1977 - 1992 Tokyo Metropolitan University, Associate Professor
- 1992 - - 関東学院大学教授
- 1992 - Tokyo Metropolitan University
- 1992 - - Tokyo Metropolitan University, Professor
- 1969 - 1977 Tokyo Metropolitan University
- 1969 - 1977 Tokyo Metropolitan University, Research Assistant
- Kanto Gakuin University College of Economics, Department of Business Administration
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