By 1930, nationalism burned hotter than ever in Japan and created a climate receptive to Ishii’s ideas of developing biological weapons. In September 1931, Japanese forces instigated the “Mukden Incident.” The pitched battle between Japanese and Chinese forces was actually no more than a Japanese ruse used to justify a complete takeover of Manchuria.

Cook, Haruko Taya; Cook, Theodore F. (1992). Japan at war: an oral history (1sted.). New York: New Press. p.162. ISBN 1565840143. Thousands of men, women, children, and infants interned at prisoner of war camps were subjected to vivisection, often performed without anesthesia and usually lethal. [28] [29] In a video interview, former Unit731 member Okawa Fukumatsu admitted to having vivisected a pregnant woman. [30] Vivisections were performed on prisoners after infecting them with various diseases. Researchers performed invasive surgery on prisoners, removing organs to study the effects of disease on the human body. [31] Human dissection experiment room The author Seiichi Morimura published The Devil's Gluttony [ ja] (悪魔の飽食) in 1981, followed by The Devil's Gluttony: A Sequel in 1983. These books purported to reveal the "true" operations of Unit731, but falsely attributed unrelated photos to the Unit, which raised questions about their accuracy. [120] [121]

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Also in 1981, the first direct testimony of human vivisection in China was given by Ken Yuasa. Since then, much more in depth testimony has been given in Japan. The 2001 documentary Japanese Devils largely consists of interviews with fourteen Unit731 staff members taken prisoner by China and later released. [122] Significance in postwar research on bio-warfare and medicine

a b "Yoshio Shinozuka – UNIT 731". Unit 731 Museum. Archived from the original on 2021-10-09 . Retrieved 2021-09-11. Materials on the Trial of Former Servicemen of the Japanese Army Charged With Manufacturing and Employing Bacteriological Weapons. Moscow: Foreign Languages Publishing House. 1950. p.427. Unit100 also experimented with toxic gas. Phone booth-like tanks were used as portable gas chambers for the prisoners. Some were forced to wear various types of gas masks; others wore military uniforms, and some wore no clothes at all.After World WarII, the Office of Special Investigations created a watchlist of suspected Axis collaborators and persecutors who are banned from entering the United States. While they have added over 60,000names to the watchlist, they have only been able to identify under 100 Japanese participants. In a 1998 correspondence letter between the DOJ and Rabbi Abraham Cooper, Eli Rosenbaum, director of OSI, stated that this was due to two factors: