Bachelor of Science, Keio University, 1950. Doctor of Medicine, Keio University, 1954.
Member department of surgery, Keio U. School Medicine, Tokyo, 1958-1963; resident, East Tennessee Baptist Hospital, Knoxville, 1963-1964; resident, junior staff member, Mallory Institute of Patholoty, Boston, 1964-1968; associate pathologist, Monmouth Medical Center, Long Branch, New Jersey, 1968-1969; associate pathologist, U. Hospital, Boston, 1972-1973; associate pathologist, St. Vincent Hospital, Worcester, Massachusetts, 1973-1974; staff department pathology, U. Massachusetts Medical Center, Worcester, 1974-1976; chief surgical pathology, U. Massachusetts Medical Center, Worcester, 1976-1979; professor, Saitama (Japan) Medical School, since 1979.
Member American Association Pathologists, Japanese Society Pathologists, Japanese Society Hematology, Japanese Society Clinical Heamtology.
Married Yukiko Yanai, March 30, 1961. Children: Ken, Taul, Makoto.