The Sinking of the Junyo Maru One of the largest, yet most forgotten, maritime disaster of WWII Index Read here about this disaster. Little known, yet one of the largest - in terms of loss of life - from WWII. The Junyo Maru - 5620 Dutch, English, Australian and American POWs and Javanese slave labourers died when this 5000 ton Japanese cargo boat - under the command of Japanese Forces - was ...