- 1991 - 現在 Chiba Cancer Center
- 1991 - 現在 Director, Chiba Cancer Center Res. Inst.
- 1981 - 1991 Chiba Cancer Center
- 1981 - 1991 Head, Div. Biochemistry,
- 1972 - 1981 Chiba Cancer Center
- 1972 - 1981 Senior Research Fellow, Div. Biochemistry,
- 1969 - 1972 Massachusetts Institute of Technology
- 1969 - 1972 Research Associate Dept of Biology, M.I.T.
- Chiba Cancer Center Res. Inst.
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