- 1970 - 2000 Sophia University
- 1970 - 2000 Sophia University Professor
- 1966 - 1970 Rikkyo University
- 1966 - 1970 Rikkyo University, Professor
- 1959 - 1966 Rikkyo University
- 1959 - 1966 Rikkyo University, Assistant Professor
- 1958 - 1959 The University of Tokyo
- 1958 - 1959 University of Tokyo, Research Assistant
- Seigakuin University Faculty of Political Science & Economics, Local Community Policy Department
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