Hideo Shimizu, a former member of Unit 731, the notorious Japanese germ-warfare detachment during World War II, recalled the terrifying experience he had during the Japanese invasion of China and expressed his deep apology. Shimizu was among the last batch of Unit 731 Youth Corps members sent by Japan to Harbin, where he spent more than four months witnessing the war crimes committed by the unit, including the cultivation of pathogens, human dissections and human experiments. At a press conferen