Kwantung Army

Unit 731 , officially known as the Manchu Detachment 731 and also referred to as the Kamo Detachment and the Ishii Unit, was a secret research facility operated by the Imperial Japanese Army between 1933 and 1945. It was located in the Pingfang district of Harbin, in the Japanese puppet state of Manchukuo, and maintained multiple branches across mainland China and Southeast Asia.

1945 invasion; part of the Soviet–Japanese War of World War II

group of the Imperial Japanese Army from 1919 to 1945

airline

area of Japanese extraterritorial rights in northeast China in 1937