While babies were born in Unit 731, all of the hundreds of prisoners who were alive when Japan surrendered at the end of the war were murdered and buried as the imperial army tried to cover up ...

For decades, the nightmarish legacy of Japan's Unit 731 during World War II has been shrouded in secrecy, but a new scientific study is bringing much-needed attention to this dark chapter in history.

Shimizu spent over four months with Unit 731 before fleeing with retreating Japanese forces. When he returned home, he was told never to speak about what he had seen. For over 70 years, he didn’t.