The issue of "Comfort Women' was also notoriously absent from history for generations. Remember that it took untill the year 2002 to declare the crimes committed by Unit 731[Japan] to be properly labled a "crime against humanity". The use of human beings without consent, whether for madical experimentation, or sexual explotation is still a manifest form of slavery.
Poland's central bank head calls story of Nazi train find a hoax (Reuters)
from the article: New book gives a voice to Jewish victims of Holocaust sexual violence