Bachelor of Science, University Tokyo, 1953. Master of Science, University Chicago, 1955. Doctor of Philosophy, University Tokyo, 1959.
Researcher Kyowa Hakko Company, Tokyo, 1953-1962. Research associate University Chicago, Chicago, 1959-1961. Fellow Harvard Medical School, Boston, 1961-1962.
Researcher Ist. of Physical and Chemical Research, Tokyo, 1963-1971. Professor Biotechnology Nagoya (Japan) University, 1971-1994. Professor Tokyo University Agriculture, 1994—2001.
Fellow American Academy Microbiology. Member Japanese Society for Bioscience Biotechnology and Agrochemistry, Japanese Society for Biochemistry, Japanese Society for Molecular Biology, American Society for Microbiology.
Married Yukiko Koizumi, November 24, 1958. Children: Yumi Ito, Mami Sasaki, Miho Matsuyama.