Tuna Fishing Maru - the inappropriately named The Japanese fishing ship, the Fuku of TTeh in the well at the time of the "Fortunate Lragon" « had a few tons first detonation of the CASTLE series. ‘The ship, according to her Japanese master, was at latitude 11° 53' Nerth and longitude 166° 50' East, about 50 miies from the detonation. The gross fallout - which was chiefly partially hydrated calcium oxide in all orobability, with a relatively small amount of mixed fission products - contaminated the fish externally, out the fact of this contamination was not appreciated until after the ship had docked at Yaisu and the catch had been delivered to market. In a surprisingly short time the fish were scattered in various municipal markets all the way to Csaka. ‘The Japanese vigorously pursued the recovery of these fish as soon as the contamination was realized, and I believe that all, or very nearly all, of the fish of this cargo were recovered and destroyed. The impact of the press announcements was profound in Japan, and there was widespread apprehension that a large portion of the entire tuna catch might be heavily contaminated and deadly te persons coming into contact with the fish. portions of the Japanese press pave some vbesis for these fears. Some I sent Mr. Merril idsenbud of the Health and (.afety Laboratory, New York Operations Office, to Tokyo on March 19 to assist in the collection of specimens for radiochemical analysis with particular reference to the problem of the Japanese fishermen. He was instructed also to look into the matter of tne monitoring of tuna fisn orought into Japan, with especial reference for these destined for exoort. On March 22 I talked with Mr. James R. Cribpett of the Food and lUrmg administration concerning the monitoring of tune fish comin: into the United states, and offered the support of this office and the dealth and safety Laveratory in such @ program to whatever degree might be necessary with respect to both personnel and equipment. They have been pursuing such monitoring at ali or tne ports of entry on the ‘est Coast. ** Canned Tuna (1952) Japan exported to UeSeie Japan exported to other countries 960,150 cases (li 7 on. cans per case) 123,930 cases 1,064,050 cases