- 1998 - 2002 Osaka Kyoiku University, Professor
- 1998 - 2001 Osaka Kyoiku University
- 1976 - 1997 Osaka Kyoiku University
- 1976 - 1997 Osaka Kyoiku University, Associate Professor
- 1974 - 1976 米国ジョンズ・ホプキンス大学医系病理生物学 研究職員
- 1974 - 1976 The Johns Hopkins University, Department of Pathobiology, Research Associate
- 1967 - 1976 京都大学附置ウイルス研究所 助手
- 1967 - 1976 Kyoto University, Institute for Virus Research, Research Associate
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