Doctor of Medicine, University Tokyo, 1953. Doctor of Philosophy, University Tokyo, 1959.
Assistant 1st department medicine, U. Tokyo, Japan, 1959-1974; professor medicine, chairman 1st department medicine, Hamamatsu (Japan) U. School Medicine, 1974-1984; vice-president, director university hospital, Hamamatsu (Japan) U. School Medicine, 1984-1990; professor emeritus, Hamamatsu (Japan) U. School Medicine, since 1990; director, Tokyo (Japan) Senbai Hospital, 1990-1996. Chairman science program committee 11th International Congress of Nephrology, Tokyo,1990-.
Member research-steering committee Salt Science Research Foundation, Tokyo, 1990-1996. Fellow Japanese Society Internal Medicine (honorary member). Member Japanese Society Nephrology (honorary member, president 1989), Japanese Physiological Society (councilor), International Society Nephrology (commission on acute renal failure 1989-1997), Kidney Foundation Japan (director since 1992, award for studies on acute renal failure 1986, award for contribution to progress of nephrology in Japan 1994), Japanese College Angiology (honorary), Association Nursing Schools in Japan (vice president 1994-1996, consultant since 1997).
Married Toshiko Iwaki, June 4, 1957. Children: Masatoshi, Hiroshi.