http://en.wikipedia.org/wiki/Unit_731
"Unit 731 was a secret military medical unit of the Imperial Japanese Army that researched biological warfare and other topics through human experimentation during the Sino-Japanese War (1937-1945) and World War II era."
"After these laboratories were destroyed by the Japanese to hide their activities, many of the scientists involved went on to prominent careers in politics, academia and business. The US allowed these scientists to go unprosecuted in exchange for their experimentation data."
http://today.reuters.com/news/newsArticle.aspx?type=scienceNews&storyID=2005-05-05T123320Z_01_PEK358312_RTRIDST_0_SCIENCE-CHINA-JAPAN-WAR-DC.XML
China recalls Japanese germ warfare experiments
"At least 3,000 people, including Chinese civilians, Russians, Mongolians and Koreans, were killed in tests of biological weapons and other experiments at Unit 731 between 1939 and 1945, Chinese state media say.
Biological weapons developed at the base are believed to have killed more than 200,000 Chinese during the Japanese occupation."
"Wang is leading the effort to win the base UNESCO World Heritage protection, a status the U.N. body has granted to the Nazi concentration camp at Auschwitz in Poland and the Hiroshima Peace Memorial in Japan."