Master of Arts in Literature, Kyoto University, 1956. Doctor of Literature, Kyoto University, 1992.
Research fellow, Warsaw (Poland) U., 1962-1965; research fellow, U. Vienna, Austria, 1965-1966; from lecturer to professor of history, Kyoto (Japan) Sangyo U., since 1968. Guest professor of University London, 1981.
Member Japanese Society for Slavic and East European Studies (director 1979, editor since 1980), Japanese Society of Western History (representative 1988-1989), International Society for Eighteenth Century Studies.
Married Yoko Sugimura, January 11, 1960. Children: Kaori, Akari.