Master of Science, University Tokyo, 1944. Doctor of Philosophy, University Tokyo, 1958.
Assistant professor Kanazawa University, Japan, 1946-1953, Kyushu University, Fukuoka, Japan, 1953-1960, professor Japan, 1963-1966. Assistant visiting professor University Southern California, Los Angeles, 1960-1963. Visiting professor University Wisconsin, Madison, 1966-1968.
Professor mathematics Tokyo Woman's Christian University, since 1969.
Member Mathematics Society Japan, American Mathematics Society, Societe Mathematique de France.
Married Misao Kamio, April 22, 1951. 1 child, Miyako.