| 1989– | Research member, Pathology Division, National Cancer Center Research Institute |
| 1996– | Head of Section, Pathology Division, National Cancer Center Research Institute |
| 1996–1997 | Visiting Research Fellow, The Burnham Institute (Dr. Erkki Ruoslahti) |
| 1999– | Chief, Pathology Division, National Cancer Center Research Institute |
| 2002– | Professor, Department of Pathology, Keio University School of Medicine |
| 2009– | Vice-dean, Keio University School of Medicine |
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