Guide: to the Shadowy Organizations That Rule the World - Issue 011. Unit 731. Building on the site of the Harbin bioweapon facility of Unit 731 Unit 731 (Japanese: 731部隊, Hepburn: Nana-san-ichi Butai?)
Was a covert biological and chemical warfare research and development unit of the Imperial Japanese Army that undertook lethal human experimentation during the Second Sino-Japanese War (1937–1945) of World War II. It was responsible for some of the most notorious war crimes carried out by Japan. Unit 731 was based at the Pingfang district of Harbin, the largest city in the Japanese puppet state of Manchukuo (now Northeast China). It was officially known as the Epidemic Prevention and Water Purification Department of the Kwantung Army (関東軍防疫給水部本部, Kantōgun Bōeki Kyūsuibu Honbu?).