the threat of nuclear bombs, it also has an important place in the history of Japan's wooden fishing boats," he said.

The Fukuryu Maru was used as a training vessel for 10 years by Tokyo University of Fisheries after its radioactivity was confirmed two years after the blast to have fallen to safe levels. It was abandoned in the 1960s at Yumenoshima, at the time a vast Tokyo Bay garbage dump.

The vessel was on the verge of sinking when a campaign was launched to raise money to preserve it.