As a survivor of the Junyo Maru disaster his father performed forced labour as a POW on the Pakan Baroe railroad on Sumatra .
The Junyo Maru disaster had been mistakenly torpedoed by the British .
As a survivor of the Junyo Maru disaster , which had been mistakenly torpedoed by the British , his father performed forced labour as a POW on the Pakan Baroe railroad on Sumatra .