The restored fishing boat Lucky Dragon the crew of which became unfortunate victims of nuclear fallout fallowing a thermonuclear test at Bikini Atoll is on display at Tokyo Metropolitan Daigo Fukuryū Maru Exhibition Hall. On 1 March 1954, 23 fishermen were hunting tuna near the Marshall Islands, when they witnessed the larger than predicted Castle Bravo nuclear test conducted by the US. Later on the fishermen were subjected to a strange white rain containing particles of radioactive fallout mixed with the coral reef debris. Unaware of the danger of the contamination on their bodies and the ship's surfaces, the fishermen headed back to Japan and over the following days developed symptoms of acute radiation syndrome. One crew member died later in hospital.

Daigo Fukuryū Maru was a Japanese tuna fishing boat with a crew of 23 men which was contaminated by nuclear fallout from the United States Castle Bravo thermonuclear weapon test at Bikini Atoll on March 1, 1954. The crew suffered acute radiation syndrome for a number of weeks after the Bravo test in March. All recovered from the immediate effects of the American test detonation except for Kuboyama Aikichi, the boat's chief radioman, who died on September 23, 1954, from complications of radiation sickness. Kuboyama is considered the first victim of the hydrogen bomb and of the Castle Bravo test.