Bachelor, Kyoto University, Japan, 1956. Master of Arts, Kyoto University, Japan, 1958. Doctor of Philosophy, Kyoto University, Japan, 1976.
Member research staff National Diet Library., Tokyo, 1961-1966. Professor history Kanagawa University, Yokohama, Japan, 1966-1976. Professor international history Meiji University, Tokyo, 1976—2004.
Member International Society Study of Time, International Society Comparative Study Civilizations.
Married Nakako Kado, May 9, 1964. Children: Shun-ichi, Chiyoko.