Forgot to add this when I saw the post which was not mentioned in The Intercept article:

After the war, Japan sold all the human experimentation data from Unit 731 to the United States, and MacArthur granted immunity to those involved. Cambridge historian Richard Drayton said that Shiro Ishii, the chief expert of Unit 731, went to Maryland after the war to conduct biological weapons research. However, this history has been completely covered up.

After 1945, we borrowed many fascist methods. Nuremberg only punished a handful of the guilty; most walked free with our help. In 1946, Project Paperclip secretly brought more than 1,000 Nazi scientists to the US. Among their ranks were Kurt Blome, who had tested nerve gas at Auschwitz, and Konrad Schaeffer, who forced salt into victims at Dachau. Other experiments at mind control via drugs and surgery were folded into the CIA’s Project Bluebird. Japan’s Dr Shiro Ishii, who had experimented with prisoners in Manchuria, came to Maryland to advise on bio-weapons. Within a decade of British troops liberating Belsen, they were running their own concentration camps in Kenya to crush the Mau Mau. The Gestapo’s torture techniques were borrowed by the French in Algeria, and then disseminated by the Americans to Latin American dictatorships in the 60s and 70s. We see their extension today in the American camps in Cuba and Diego Garcia.

https://www.theguardian.com/politics/2005/may/10/foreignpolicy.usa