What unit was directed by Shiro Ishii and based at the Pingfang district of Harbin?
Shirō Ishii Surgeon General Shirō Ishii (石井 四郎 , Ishii Shirō , ; June 25, 1892 – October 9, 1959) was a Japanese army medical officer, microbiologist and the director of Unit 731, a biological warfare unit of the Imperial Japanese Army involved in forced and frequently lethal human experimentation during the Second Sino-Japanese War (1937–1945).
Heilongjiang Heilongjiang () is a province of the People's Republic of China. Located in the northeastern part of the country, Heilongjiang is bordered by Jilin to the south and Inner Mongolia to the west. It also shares a China–Russia border with Russia to the north and east. The capital and the largest city of the province is Harbin. Among Chinese provincial level Administrative divisions, Heilongjiang is the 6th largest by total area and the 15th most populous.