NATIONAL INSTITUTE OF RADIOLOGICAL SCIENCES 9-1, 4-chome, Anagawa, Chiba-shi, Japan Résumé of Professional Background I was graduated from School of Medicine, Tokyo University in 1945 and received a degree of Doctor of Medicine. After the graduation I entered the 3rd Department of Internal Medicine, Tokyo University as a research fellow. In October 1945 I went to Hiroshima for the survey and treatment of A-bomb victims and spent about two months. I practiced hematology. From 1948 to 1950 I was also a lecturer of Tokyo Medical and Dental College. In 1952 I moved to First National Hospital of Tokyo. When Bikini radiation accident occured I took charge of the treatment of Japanese fishermen exposed to fallout radiation in March 1954, In 1956 I got the scholarship of Japanese Government and studied radiation hematology for about a year mainly in Oxford University, England, [also visited other European countries and U.S.A. for the study until October in 1957. In 1959 I was appointed to Chief of lst Laboratory of Clinical Investigation at National Institute of Radiological Sciences. In October, 1962, I was invited to the scientific meeting on ''Diagnosis and Treatment of Radioactive Poisoning" by the International Atomic Energy Agency. In March, 1964, I went to the Marshall Islands to observe the examinations of the exposed Marshallese with U.S. AEC team. In 1965 I was appointed to Head of Division of Radiation Health at National Institute of Radiological Sciences. In June, 1966, I went to U.S.A. and several European countries as a leader of a party of investigation on 'Medical Supervision of Plutonium Operator", In August, 1970, I attended to the 13th International Congress of Hematology which was held in Munich. Since 1954, I have continued the follow-up studies on above mentioned Japanese fishermen. Ihave published many papers on the subjects of hematology and radiation effects on human being. a ™ /: digo: , A im AT) a Toshiyuki Kumatori, M.D. 219 1014828