Crouching dragons: the suicide divers Japan never sent to war

Japan’s wartime kamikaze pilots remain among the most recognisable symbols of the Pacific war: young men flying aircraft into Allied ships on missions from which they were not expected to return. Far less well-remembered are the fukuryu – suicide frogmen trained in the closing months of World War II to walk into the sea with mines on bamboo poles, then wait beneath the waves for an Allied invasion