paratyphoid, to contaminate rivers, wells, reservoirs and houses; mixed food with deadly bacteria to infect hungry Chinese civilians; and even passed out chocolate filled with anthrax bacteria to the local children. During the final months of World War II, Japan had planned to use plague as a biological weapon against U.S. civilians in San Diego, California, during Operation Cherry Blossoms at Night, hoping that the plague would spread terror to the American population, and thereby dissuade America from attacking Japan. The plan was set to launch at night on 22 September 1945, but Japan surrendered five weeks earlier. On 11 March 1948, 30 people, including several doctors and one female nurse, were brought to trial by the Allied war crimes tribunal. Charges of cannibalism were dropped, but 23 people were found guilty of vivisection or wrongful removal of body parts. Five were sentenced to death, four to life imprisonment, and the rest to shorter terms. In 1950, the military governor of Japan, General Douglas MacArthur, commuted all of the death sentences and significantly reduced most of the prison terms. All of those convicted in relation to the university vivisection were free after 1958. In 2006, former IJN medical officer Akira Makino stated that he was ordered—as part of his training—to carry out vivisection on about 30 civilian prisoners in the Philippines between December 1944 and February 1945. The surgery included amputations. Most of Makino's victims were Moro Muslims. Ken Yuasa, a former military doctor in China, has also admitted to similar incidents in which he was aggressively performing live vivisections on live Chinese victims, blaming the nationalistic indoctrination of his schooling for his conduct and lack of remorse. The Imperial House of Japan was responsible for the human experimentation programs, as members of the imperial family, including Prince Higashikuni Naruhiko, Prince Chichibu, Prince Mikasa and Prince Takeda Tsuneyoshi, participated in the programs in various ways, which included authorizing, funding, supplying, and inspecting biomedical facilities. Use of chemical weapons According to historians Yoshiaki Yoshimi and Kentaro Awaya, during the Second Sino-Japanese War, gas weapons, such as tear gas, were used only sporadically in 1937, but in early 1938 the Imperial Japanese Army began full-scale use of phosgene, chlorine, Lewisite and nausea gas (red), and from mid-1939, mustard gas (yellow) was used against both Kuomintang and Communist Chinese troops. According to Yoshimi and Seiya Matsuno, Emperor Hirohito signed orders specifying the use