| 1973 | graduated from Kyoto University School of Medicine |
| 1982 | Assistant Professor of 1st Department of Surgery, Kyoto University School of Medicine |
| 1994 | Senior assistant Professor of 1st Department of Surgery, Kyoto University School of Medicine |
| 1998 | Associate Professor of 1st Department of Surgery, Kyoto University School of Medicine |
| 2000 | Professor and Chairman of Department of Hepato-Biliary-Pancreatic Surgery, Tokyo Medical and Dental University |
| 2012 | President of Hamamatsu Rosai Hospital, Japan Labour Health and Welfare Organization, |
| Professor emeritus of Tokyo Medical and Dental University |
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