When Did Shiro Ishii Die?

Surgeon General Shirō Ishii was a Japanese microbiologist, army medical officer, and war criminal who served as the director of Unit 731, a biological warfare unit of the Imperial Japanese Army.

What happened to Unit 731 after the war?

Upon the formal surrender of the Japanese in August 1945, Unit 731 was officially terminated. ... Unlike some of the Nazi doctors who conducted experiments on prisoners and concentration camp inmates, none of those involved with the experiments at Unit 731 were ever punished for their crimes.

What did Unit 731 Discover?

Unit 731 of the Japanese Imperial Army conducted research by experimenting on humans and by "field testing" plague bombs by dropping them on Chinese cities to see whether they could start plague outbreaks. They could.