Doctor of Medical Science, University of Tokyo
- Professor of Medicine, Department of Medicine, UCLA School of Medicine (until October 1983)
- Professor and Chairman, First Department of Medicine, University of Tokyo Faculty of Medicine (until June 1996)
- Professor of Medicine, Tokai University School of Medicine (until October 2006)
- Dean, Tokai University School of Medicine (until March 2002)
- Director, the Institute of Medical Science, Tokai University (until March 2004)
- Adjunct Professor, the Research Center for Advanced Science and Technology, University of Tokyo (until March 2007)
- Professor, National Graduate Institute for Policy Studies (until October 2009)
| April 1993 | Science Advisor, Ministry of Education , Science and Culture (until June 1996) |
| August 2001 | Member of Study Committee, new graduate university in Okinawa, CAO (until March 2003) |
| October 2001 | Special member of Committee of Space Development, MEXT (- present) |
| April 2003 | Member, Okinawa Promotion and Development Council, CAO (until March 2007) |
| July 2003 | President of the Science Council of Japan (until September 2006) |
| Member, Council for Science and Technology Policy, CAO (until September 2006) | |
| April 2004 | Advisory Panel for MEXT Minister “Redesigning Compulsory Education for a New Era” (until March 2005) |
| September 2005 | Member, Board of Governors, Okinawa Institute of Science and Technology Promotion Corporation (until October 2011) |
| October 2006 | Special advisor to the Cabinet (Science, Technology, and Innovation) (until October 2008) |
| 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) |
| November 1999 | Order of Purple from the Government of Japan for Excellence in Academic Achievements |
| November 2000 | Lifetime Achievement Award, Japanese Society of Nephrology |
| December 2009 | Order Legion de Honour of the Government of France |
| December 2010 | Person of the Year of the American Chamber of Commerce of Japan |
