- 1983 - 2006 Sophia University Faculty of Humanities
- 1983 - 2006 visiting assistant professor、Sophia University
- 2004 - - 医学部、医学教育統轄センター長
- 2004 - - 医学部教授
- 2004 - - Director of Medical Education Center
- 2004 - - Professor, Keio University School of Medicine
- 2002 - 2003 慶應義塾大学病院 神経内科部長代行
- 2002 - 2003 Director, Department of Neurology, Keio University
- 1986 - 2003 医学部専任講師
- 1986 - 2003 Assistant Professor
- 2003 - - 医学部助教授
- 2003 - - Associate Professor
- 2001 - 2002 大学病院診療科副部長(内科, 神経内科)
- 1999 - 2002 Keio University School of Medicine
- 1999 - 2002 Vice-director, Department of Neurology, Keio University School of Medicine
- 2002 - - 大学病院診療科部長代行(内科, 神経内科)
- 1999 - 2001 大学病院診療科副部長(内科, 神経内科)
- 1999 - 2000 大学病院診療科医長(内科, 神経内科)(病棟担当)
- 1983 - 1986 大田原赤十字病院、内科部長、神経内科部長
- 1983 - 1986 Director of Internal Medicine and Neurology, Ootawara Red Cross Hospital
- 1986 - - 大学専任講師(医学部内科学)
- 1982 - 1983 大学助手(医学部内科学)
- 1980 - 1982 Reserch Assiciate, Department of Neurology, Baylor College of Medicine
- 1980 - 1982 大学医学部助手(内科学)
- 1980 - 1982 Reserch Assiciate, Department of Neurology, Baylor College of Medicine
- 1978 - 1980 大学助手(医学部内科学)
- 1975 - 1979 Keio University School of Medicine
- 1975 - 1979 Fellow, Keio University Sckool of Medicine
- 1978 - 1978 大学医学部助手(内科学)
- 1970 - 1971 Keio University School of Medicine
- 1970 - 1971 Resident, Keio University Hospital
