M.D., Medical School, University of Tokyo
- Visiting researcher, Department of Pharmacology, University of Cambridge (until August 1976)
- Professor, Department of Neurology, University of Tsukuba (until March 1991)
- Professor, Department of Neurology, University of Tokyo (until March 2002)
- Director, University of Tokyo Hospital (until March 1999)
- Director General, National Institute of Neuroscience, Japan (until March 2003)
- President, National Center of Neurology and Psychiatry, Japan (until March 2007)
- April 2007, President emeritus, National Center of Neurology and Psychiatry (- present)
- Vice President and Professor, International University of Health and Welfare Graduate School, Japan (until January 2011)
- January 2011, President and Professor, International University of Health and Welfare Graduate School, Japan (- present)
| May 1996 | President, Japanese Society of Internal Medicine MEXT (until May 1999) |
| August 1996 | Science Advisor, MEXT (until March 2002) |
| April 2002 | Consultant Medical Doctor for Royal Families, Japan (- present) |
| May 2002 | President of the Japanese Society of Neurology (until May 2006) |
| October 2006 | President, Science Council of Japan (until June 2011) Member, Council for Science and Technology Policy, Japan (- present) |
| July 2007 | Member, Board of Governors, Okinawa Institute of Science and Technology Promotion Corporation (until October 2011) |
| September 2009 | Establishing Member of Okinawa Institute of Science and Technology School Corporation (until October 2011) |
| November 2011 | Member, Board of Governors, Okinawa Institute of Science and Technology School Corporation (-present) |
| January 1997 | Intractable Disease Foundation Award, Japan |




