- 1990 - 1991 Akita University
- 1990 - 1991 Akita University, Assistant Professor
- 1980 - 1990 Akita University
- 1980 - 1990 Akita University, Research Assistant
- 1975 - 1980 Saitama Medical University
- 1975 - 1980 Saitama Medical School, Research Assistant
- 1971 - 1973 Jikei University
- 1971 - 1973 Jikei University, Research Assistant
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