Remnants of Unit 731 Human Experiment Center in China TOKYO — A former soldier of a biological warfare unit of the Imperial Japanese Army believes he has a duty to tell the truth about Japanese war crimes committed in China during World War II as part of his effort to apologize for his deeds and because much of what happened is still unknown. Yoshio Shinozuka, 78, has spoken about his war experiences across the country over the decades, vowing not to remain silent about the activities of the notorious Unit 731. The secret unit is believed by some historians...