- 1998 - 2001 Prof.Meikai Univ.
- 1988 - 2001 Meikai University Faculty of Languages and Cultures
- 1970 - 1988 城西歯科大学教授
- 1970 - 1985 Prof.J.D.U.
- 1968 - 1970 Josai University Faculty of Sciences
- 1968 - 1970 Ass Prof. Josai Univ.
- 1965 - 1968 National Institute of Genetics
- 1965 - 1968 Reseach Ass.Adp Genet N.I.G.
- 1964 - 1965 シカゴ大学動物学教室研究員
- 1964 - 1965 Reseach Ass.Dept.Zoology.U.Chicago
- 1962 - 1964 テキサス大動物学教室研究員
- 1962 - 1964 Reseach Ass.Dept.Zoology.U.Texas
- 1960 - 1962 文部省奨励研究生
- 1960 - 1962 Dost Doc.Fellow.M.E.
- 1958 - 1960 National Institute of Genetics
- 1958 - 1960 Research Fellow of Rice Study of N.I.G.
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