- 1981 - 1998 Shizuoka University Faculty of Education
- 1981 - 1998 Assistant Professor, Faculty of Education, Shizuoka University
- 1998 - - 静岡大学教育学部教授
- 1998 - - Professor, Faculty of Education, Shizuoka University
- 1979 - 1981 Shizuoka University Faculty of Education
- 1979 - 1981 Lecturer, Faculty of Education, Shizuoka University
- Shizuoka University Faculty of Education, Mathematics Education, Faculty of Education Professor
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