Doctor of Medicine, University Tokyo, 1947. Division of Medical Sciences, University Tokyo, 1958.
Chief laboratories National Institutes of Health, Tokyo, 1948-1968. Director department National Institute Public Health, 1968-1973. Professor microbiology Tokyo Medical and Dental University, 1973-1990, professor emeritus, since 1990.
Professor School Home Economics Japan Women's University, Tokyo, 1990-1993. Adviser Japan Bifidus Foundation, Tokyo, since 1999. Director Kurozumi Medical Foundation, Tokyo, since 1999.
Member American Association for the Advancement of Science, American Society Microbiology (emeritus), Japanese Society Bacteriology (honorary), Japanese Association for Infectious Diseases (honorary).
Married Yukie Tanaka, November 22, 1951. Children: Saeko Nakaya Fujino, Mizuhov Nakaya.