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Nurse Vivian Bullwinkel was shot in the massacre but survived by playing dead. She hid in the jungle and was taken as a prisoner of war, before eventually returning to Australia.She was "gagged" from speaking about the rapes at the Tokyo war crimes tribunal in the aftermath of World War Two, according to Ms Silver, who researched an account Ms Bullwinkel gave to a broadcaster before she died in 2000.
"She was following orders," Ms Silver says. "In addition to the taboo, there was probably some guilt from the Australian government - senior officers knew Japanese troops had raped and murdered British nurses when the Japanese invaded Hong Kong in 1942, but were tardy in calls to evacuate the Australian nurses from Singapore."
According to the Australian government, the perpetrators of the massacre remain unknown and "escaped any punishment for their crime".
An Australian Defence Force spokesperson says a decision on whether a new investigation into these sexual assault claims will commence is up to the government, but that "new historic allegations can be reported by family" to a unit which investigates such crimes.