- 1972 - 1981 Kochi University
- 1972 - 1981 Kochi University, Assistant Professor
- 1981 - - 高知大学 教授
- 1981 - - Kochi University, Professor
- 1968 - 1972 Kochi University
- 1968 - 1972 Kochi University, Lecturer
- 1968 - Kochi University
- 1968 - Kochi University, Research Assistant
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