- 2002 - 2003 大分医科大学医学部感染分子病態制御講座(感染予防医学) 教授
- 2003 - - 大分大学医学部感染分子病態制御講座(感染予防医学) 教授
- 1997 - 2002 Oita Medical University
- 1980 - 1997 Oita Medical University
- 1980 - 1997 Associate Professor, Division of Medical Zoology, Faculty of Medicine, Oita Medical University
- 1997 - - Professor, Department of Infectious Disease Control, Faculty of Medicine, Oita Medical University
- 1976 - 1980 Kagoshima University Faculty of Medicine
- 1976 - 1980 Lecturer, Department of Medical Zoology, Faculty of Medicine, Kagoshima University
- 1969 - 1976 Kagoshima University Faculty of Medicine
- 1969 - 1976 Research Associate, Department of Medical Zoology, Faculty of Medicine, Kagoshima University
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