Bachelor in Engineering, University Tokyo, Japan, 1940. Doctor in Engineering, University Tokyo, 1951.
Lecturer, U. Tokyo, Japan, 1940-1947;
associate professor, U. Tokyo, 1947-1951;
professor, U. Tokyo, 1951-1978;
professor emeritus, U. Tokyo, since 1978;
professor, Tokyo (Japan) Denki U., since 1978;
president, Tokyo (Japan) Denki U., since 1990. Executive director Japan Society for Promotion of Science, Tokyo, 1979-1981, director general, 1981-1985. Director Japanese National Rlwys., Tokyo, 1981-1987.
Senior advisor tothe rector United Nations University, Tokyo, 1988-1995.
Fellow Institute of Electrical and Electronics Engineers (chairman Tokyo section 1985-1986). Member Institute Electronics, Information and Communications Engineers (vice president, president 1971-1972, Distinguished Service award 1974), Institute Electrical Engineers (president 1983-1984, Distinguished Service award 1985).
Married Yasuko Niwa, March 18, 1943. Children: Sumiko, Manabu, Masako.