- 1997 - 2003 Kyoto Prefectural University of Medicine
- 1997 - 2003 Instructor, Kyoto Prefectural University of Medicine
- 1990 - 1997 Sapporo Medical University School of Medicine
- 1990 - 1997 Instructor, Instruetor Sapporo Medical University
- 1988 - 1989 WHO国際癌研究機関リサーチトレーニングフエロー
- 1988 - 1989 Research training fellow,
- 1987 - 1988 国立がんセンターリサーチレジデント
- 1987 - 1988 Research Resident, National Cancer Center
- International Ageney for Research on Cancer, WHO
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