- 1994 - 1999 Dokkyo Medical University
- 1994 - 1999 Dokkyo University School of Medicine, Assistant Professor
- 1999 - - 獨協医科大学 教授
- 1999 - - Dokkyo University School of Medicine, Professor
- 1987 - 1994 Dokkyo Medical University
- 1987 - 1994 Dokkyo University School of Medicine, Lecturer
- 1978 - 1987 Dokkyo Medical University
- 1978 - 1987 Dokkyo University School of Medicine, Research Assistant
- 1975 - 1978 米国立衛生研究所 海外研究員
- 1975 - 1978 National Institutes of Health(NIH) Visiting Fellow
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