- 1994 - 2000 Iwate Medical University
- 1994 - 2000 Iwate Medical University, Professor
- 1992 - 1994 Iwate Medical University
- 1992 - 1994 Iwate Medical University, Assistant Professor
- 1989 - 1991 米軍病理学研究所・心臓血管部門・研究員
- 1989 - 1991 Armed Forces Institute of Pathology, Research Pathologi
- 1986 - 1989 ジョンスホプキンス大学小児感染症科 リサーチフェロー
- 1986 - 1989 The Johns Hopkins Hospital, Research fellow
- 1980 - 1986 Iwate Medical University
- 1980 - 1986 Iwate Medical University, Assistant Professor
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