Bachelor in Engineering, Tokyo University, 1946. Doctor in Engineering, Tokyo University, 1962. Doctor Rer. National, Technology Hochschule, Hannover, Federal Republic of Germany, 1958.
Member research staff, Ministry of Post, Tokyo, 1946-1952; member research staff Elec. Communication Laboratory, Nippon Telegraph & Telephone Public Corporation, Tokyo, 1952-1966; research director, Nippon Telegraph & Telephon Public Corporation, Tokyo, 1966-1983; director, Hamamatsu (Japan) Photonics Company, since 1983. Lecturer in field; member committee International Technology Confs., 1956-1970.
Member Physical Society of Japan, Japan Society Applied Physics, Institute Electronic and Communication Engineers of Japan, Institute Electrical Engineers of Japan, Astronomical Society Japan.
Married Toshi Mizushima, June 25, 1963. Children: Asako, Kuniyuki.