[1]: 307 During the Second Sino-Japanese War, Unit Ei engaged in "producing on a mass scale lethal bacteria to be used as weapons against the Chinese forces and civilian population" and "took a direct part in employing bacteriological weapons against the Chinese forces and local inhabitants during the military operations of the Japanese troops," according to its Chief, Shunji Sato.
"[6] Several units referred to human test subjects and corpses as ‘logs’ to be burned/incinerated, also solidifying the soldier’s assumption of what really happened on floors they were not granted access to.
[8] When the war ended, the remaining test subjects were killed, the East Zhingsahn Street complex was destroyed with explosive charges and the staff evacuated.
For this purpose the Nanking Detachment Ei was supplied with high-capacity equipment and with bacteriological experts, and it produced lethal bacteria on a mass scale.
[1]: 532 Sato testified at the Khabarovsk War Crime Trials that Unit Ei "possessed high-capacity equipment for the breeding of germs for bacteriological warfare.
[1]: 309 In late August 1942, Unit Ei participated in a biological attack against Chinese citizens and soldiers in Yushan County, Jinhua, and Fuqing.
As Kawashima Kiyoshi testified, "..[The] bacteriological weapon was employed on the ground, the contaminating of the territory being done by sabotage action.
[9] When the war ended, the remaining test subjects were killed, the East Zhongshan Street complex was destroyed with explosive charges and the staff evacuated.