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Inside Unit 731: Japan’s Secret Human Experiments - Episode 1: A Time of Monsters

47:03 Min

Through rare survivor testimony and a former Unit 731 member’s account, this investigation reveals human experiments, deadly germ attacks in China and Japan’s pursuit of biological weapons.

Inside Unit 731: Japan’s Secret Human Experiments

Inside Unit 731: Japan’s Secret Human Experiments - Episode 1: A Time of Monsters

06 Jun 2026 10:00pm

Through rare survivor testimony and a former Unit 731 member’s account, this investigation reveals human experiments, deadly germ attacks in China and Japan’s pursuit of biological weapons.

Inside Unit 731: Japan’s Secret Human Experiments

About the show:

Inside Unit 731 is a gripping two-part investigation into one of Japan’s most secretive wartime programmes – a biological warfare unit that conducted lethal human experiments.

At the centre of this story is Hideo Shimizu, one of the unit’s last surviving members. Now in his late 90s, Shimizu breaks decades of silence to reveal what he witnessed as a teenage recruit inside the unit’s complex in Harbin, China.

Through survivor testimony, declassified documents and investigations across Japan, China, Singapore, the United Kingdom and the United States, the series uncovers how Unit 731 developed biological weapons, carried out human experiments and launched germ attacks on civilians. It also examines how post-war decisions, including a covert deal with the United States, helped bury the truth for decades.

More than eighty years later, Inside Unit 731 reveals one of the war’s most closely guarded secrets and asks why justice was never served.

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