Question: Masaji Kitano was what rank when Unit 731 carried out the most notorious war crimes in Manchukuo?
Sentence (from "Zhongma Fortress"): Built in Beiyinhe, outside of Harbin, Manchukuo during the Second Sino-Japanese War, the camp served as a center for human subject experimentation and could hold up to 1,000 prisoners at any given time.
Relevant evidence: No