- 2009/04/01 - 2022/03/31 School of Business School of Business Department of Business Administration Professor
- 1996/04/01 - 2009/03/31 School of Business School of Business Professor
- 1995/04/01 - 1996/03/31 College of Science and Engineering College of Science and Engineering Professor
- 1994/04 - 1996/03 Keio University School of Medicine
- 1993/01/01 - 1995/03/31 大田原赤十字病院 神経内科部長
- 1992/08/01 - 1992/12/31 Research Assistant
- 1990/07 - 1992/07 Researcher
- 1988/07 - 1990/06 Research Assistant
- 1987/07/01 - 1988/06/30 国立療養所東埼玉病院 神経内科医師
- 1984/04/01 - 1987/06/30 Research Assistant
- 1981/04 - 1984/03 Keio University School of Medicine, Department of Internal Medicine
- 1979/04 - 1981/03 Keio University School of Medicine, Department of Internal Medicine
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