- 1981 - 1992 Yamagata University Faculty of Medicine
- 1981 - 1992 Yamagata-univ. Sch. Med.(Dermatology associate
- 1992 - - 山形大学医学部皮膚科講座教授
- 1992 - - yamagata-univ. Sch. Med.(Dermatology Professor)
- 1976 - 1981 Yamagata University Faculty of Medicine
- 1976 - 1981 yamagata-univ. Sch. Med.(Dermatology Lecturer)
- 1972 - 1976 客員,常勤研究助手(フランクフルト,マックスプランク研究所)
- 1972 - 1976 visiting, research assistant(Frankfurt am Mcin,
- 1976 - Yamagata University Faculty of Medicine
- 1976 - yamagata-university school of Medicine
- 1971 - 1972 客員研究員(イタリア,パビア大学)
- 1971 - 1972 visiting scientist(Italy, Pavia-University)
- 1968 - 1971 客員研究員(オレゴン州立霊長類研究所)
- 1968 - 1971 visiting scientist(oregon regional primate
- professor)
- (dermatology assistant)
- Max-Plank-Institute)
- research center)
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