Wikipedia
Hell ship
A hell ship is a ship with extremely unpleasant living conditions or with a reputation for cruelty among the crew. It now generally refers to the ships used by the Imperial Japanese Navy and Imperial Japanese Army to transport Allied prisoners of war (POWs) and romushas (Asian forced labourers) out of the Dutch East Indies, the Philippines, Hong Kong and Singapore in World War II. The POWs were taken to Japan, Taiwan, Manchuria, Korea, the Moluccas, Sumatra, Burma or Siam to be used as forced labor.