Daigo Fukuryū Maru
Daigo Fukuryū Maru on display in Tokyo
|Name:||Daigo Fukuryu Maru
("Lucky Dragon No.5")
|Status:||Museum ship since 1976|
|Displacement:||140.86 t (139 long tons)|
|Length:||28.56 m (93.7 ft)|
|Beam:||5.9 m (19 ft)|
|Propulsion:||250 hp (186 kW) engine|
|Speed:||5 knots (9.3 km/h; 5.8 mph)|
Daigo Fukuryū Maru (第五福竜丸, Lucky Dragon 5) was a Japanese tuna fishing boat, which was exposed to and contaminated by nuclear fallout from the United States' Castle Bravo thermonuclear device test on Bikini Atoll, on 1 March 1954.
Aikichi Kuboyama, the boat's chief radioman, died less than seven months later, on 23 September 1954, suffering from acute radiation syndrome. He is considered the first victim of the hydrogen bomb of Operation Castle Bravo.
Early days 
In 1947, the fishing boat was launched from Koza, Wakayama, named Dainana Kotoshiro Maru (第七事代丸, Kotoshiro Maru No. 7). Later it became a tuna fishing boat in Yaizu, Shizuoka, where it was renamed the Daigo Fukuryū Maru.
Nuclear test site contamination 
The Daigo Fukuryū Maru encountered the fallout from the U.S. Castle Bravo nuclear test at Bikini Atoll, near the Marshall Islands, on 1 March 1954. The boat, along with its 23 fishermen aboard, as well as their catch of fish, were contaminated. They returned to Yaizu, Japan on 14 March. The crew members, suffering from nausea, headaches, burns, pain in the eyes, bleeding from the gums, and other symptoms, were diagnosed with acute radiation syndrome and admitted to two Tokyo hospitals. On September 23, chief radio operator Mr. Aikichi Kuboyama, 40, died — the first Japanese victim of a hydrogen bomb. He left these words: "I pray that I am the last victim of an atomic or hydrogen bomb."
The sky in the west lit up like a sunrise. Eight minutes later the sound of the explosion arrived, with fallout several hours later. The fallout, fine white flaky dust of calcined coral had absorbed highly radioactive fission products, and fell on the ship for three hours. The fishermen scooped it into bags with their bare hands. The dust stuck to surfaces, bodies and hair; after the radiation sickness symptoms appeared, the fishermen called it shi no hai (死の灰, death ash). The US government refused to disclose its composition due to "national security", as the isotopic ratios, namely a percentage of uranium-237, could reveal the nature of the bomb. Lewis Strauss, the head of the AEC, issued a series of denials; he went so far as to claim the lesions on the fishermen's bodies were not caused by radiation but by chemical action of the calcined coral, that they were inside the danger zone (while they were 40 miles away), and told President Eisenhower's press secretary that the Lucky Dragon #5 was a "Red spy outfit", commanded by a Soviet agent intentionally exposing the ship's crew and catch to embarrass the USA and gain intelligence on the test. He also denied the extent of contamination of the fish caught by Daigo Fukuryu Maru and other ships. The FDA however imposed rigid restrictions on tuna imports. The United States dispatched two medical scientists to Japan to limit the public disclosure and study the effects of fallout on the ship's crew, under the pretense of helping with their treatment. Even publications of the fallout analysis were a thorny political issue.
When the test was held, the Daigo Fukuryū Maru was catching fish outside the danger zone which the U.S. government had declared in advance. However, the test was over twice as powerful as it was predicted to be, and changes in weather patterns blew nuclear fallout, in the form of a fine ash, outside of the danger zone. The fishermen realized the danger, and attempted to escape from the area, but they took time to retrieve fishing gear from the sea, exposing themselves to radioactive fallout for several hours.
Later, the United States expanded the danger zone and it was revealed that in addition to the Daigo Fukuryū Maru, many other fishing boats were in the expanded zone at the time. It is estimated that about one-hundred fishing boats were contaminated to some degree by fallout from the test. Many hundreds of inhabitants of the Marshall Islands were also exposed, and a number of islands had to be evacuated entirely.
After Daigo Fukuryū Maru returned to its homeport of Yaizu, Shizuoka on 14 March 1954, Japanese biophysicist Yasushi Nishiwaki immediately traveled from Osaka to Yaizu to examine the crew and their boat. He quickly concluded that they had been exposed to radioactive fallout and wrote a letter to the chief of the United States Atomic Energy Commission asking for more information on how to treat the crew. The US did not respond to Nishiwaki's letter or to letters from other Japanese scientists requesting information and help.
The US at first tried to cover up the Lucky Dragon incident, sequestering the victims and declaring the site off limits. Later the United States paid Kuboyama's widow and children the equivalent in yen of about $2,500 ($21,400 in 2013).
The tragedy of the Daigo Fukuryū Maru gave rise to a fierce anti-nuclear movement in Japan, rising especially from the fear that the contaminated fish had entered the market. The U.S. government feared this movement would lead to an anti-American movement, and attempted to quickly negotiate a settlement with the Japanese government (led at the time by the Prime Minister Shigeru Yoshida, who was considered to be a pro-U.S. politician[by whom?]). Nevertheless, the Japanese and U.S. governments reached a political settlement, which gave the fishery a compensation of US$2 million with the surviving victims receiving about ¥ 2 million each ($5,550 in 1954, $47,400 in 2013). It was also agreed that the victims would not be given Hibakusha status. The Japanese government also acknowledged that it would not pursue further reparations from the U.S. government.
Film version 
See also 
- History of nuclear weapons
- Project 4.1 — study of other victims of Bravo contamination
- Yaizu — homeground of the Fifth Lucky Dragon
- Anti-nuclear movement
- History of the anti-nuclear movement
- The Plutonium Files
- Nuclear disasters involving Japan
- Atomic bombings of Hiroshima and Nagasaki (1945)
- Mutsu (ship) (1974)
- Tokaimura nuclear accident (1997, 1999)
- Fukushima Daiichi nuclear disaster (Okuma, 2011)
Notes and references 
- "The Japan Times". March 1, 2009. Retrieved March 23, 2010.
- Lorna Arnold and Mark Smith. (2006). Britain, Australia and the Bomb, Palgrave Press, p. 77.
- Schreiber, Mark, "Lucky Dragon's lethal catch", Japan Times, 18 March 2012, p. 7.
- Bombs in the backyard: atomic testing and American politics By A. Costandina Titus, University of Nevada Press, 2001 ISBN 0-87417-370-1.
- Altered states: the United States and Japan since the occupation By Michael Schaller, Oxford University Press US, 1997 ISBN 0-19-506916-1.
- Chasing Loose Nukes. By Derek Duke
- Joseph Rotblat: visionary for peace. By Reiner Braun, Wiley-VCH, 2007 ISBN 3-527-40690-5
- Hoffman, Michael, "Forgotten atrocity of the atomic age", Japan Times, 28 August 2011, p. 11.
- Kyodo News, "Scientist immediately sought details from U.S. on 1954 Bikini H-bomb test", Japan Times, 11 January 2012, p. 2. Nishiwaki's letter, as of January 2012, was on display at the National Atomic Testing Museum in Nevada.
- Clarfield & Wiecek 1984, p. 207
- In 25 April 1949 the US dollar was pegged to the YEN at $USD 1 = 360 YEN
- Keiji Hirano (February 29, 2004). "Bikini Atoll H-bomb damaged fisheries, created prejudice". chugoku. Retrieved 2008-11-30.
- 都立 第五福竜丸展示館 Official Site
Further reading 
- Oishi, Matashichi (2011). The Day the Sun Rose in the West: The Lucky Dragon, and I. University of Hawaii Press.
- Clarfield, Gerard H.; Wiecek, William M. (1984). Nuclear America: military and civilian nuclear power in the United States, 1940-1980 (1984 ed.). Harper & Row. ISBN 9780060153366. - Total pages: 518
- Official website of the Tokyo Metropolitan Daigo Fukuryū Maru Exhibition Hall (Japanese)
- Daigo Fukuryū Maru Exhibit at the Official Homepage of the Hiroshima Peace Memorial Museum[dead link]
- Daigo Fukuryū Maru at the Internet Movie Database