- 1993 - 1996 大阪府立成人病センター研究所第8部室長
- 1993 - 1996 Chief Investigator at the Department of Pathology, The Center for Adult Diseases, Osaka
- 1996 - - 兵庫医科大学第1病理教授
- 1996 - - Professor, Department of Pathology, Hyogo College of Medicine
- 1990 - 1993 大阪大学医学部病理病態学 助教授
- 1990 - 1993 Assistant Professor at the Department of Pathology, Medical School, Osaka University
- 1985 - 1990 大阪府立成人病センター研究所第8部室員
- 1985 - 1990 Chief Investigator at the Department of Pathology, The Center for Adult Diseases, Osaka
- 1981 - 1985 大阪大学医学部付属癌研究施設 助教授
- 1981 - 1985 Assistant Professor at Institute for Cancer Research, Medical School, Osaka University
- 1979 - 1981 アメリカ合衆国NIH研究所 visiting fellow
- 1979 - 1981 Visiting fellow at NIH(U.S.A.)
- 1976 - 1979 大阪大学医学部付属癌研究施設 非常勤医員
- 1976 - 1979 Research fellow at Institute for Cancer Research, Medical School, Osaka University
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