Doctor of Medicine, Kumamoto University, 1974. Doctor of Philosophy, Kumamoto University, 1978.
Clinical fellow, Kumamoto U. Hospital, 1978-1982; assistant professor, Kumamoto U. Hospital, 1982-1986; assistant professor, Kumamoto U. Hospital, 1988-1994; head physician School Medicine, Kumamoto U. Hospital, 1992-1994; postdoctoral fellow, M.D. Anderson Cancer Center, Houston, 1986-1988; director pediatrics, Nippon Telegraph and Telephone Kyushu General Hospital, Kumamoto, since 1995. Consultant physician Children's Cancer Association Japan, Tokyo.
Member New York Academy of Sciences, American Association for Cancer Research, Japan Society Clinical Hematology (councilor), Japanese Society Pediatrics Hematology (councilor), Japan Pediatrics Society, Japanese Society Hematology.