was an Imperial Japanese Army facility called the Kwantung Army Warhorse Disease Prevention Shop that focused on the development of biological weapons during World War II. It was operated by the Kempeitai, the Japanese military police. Its headquarters was located in Mokotan, Manchukuo, a village just south of the city of Changchun. It had branches in Dairen and Hailar. The Hailar branch was later transferred to Foshan. Between 600 and 800 people worked at Unit 100. Organization Unit 100 had six sections. Bacteriological section Pathological section Animal Experimentation Organic chemistry Botanical, and plant pathology. Poisoning, or infecting, plants with the help of bacteria. Preparations for bacteriological warfare Mission The main purpose of Unit 100 was to conduct research about diseases originating from animals. As most armies were still heavily dependent on horses, the Imperial Japanese Army hoped to find ways to kill them and therefore to weaken military power. Furthermore, they hoped to spread disease via animal carriers. To this end, former members claim that experiments were also conducted with human beings. In practice, Unit 731 was the group tasked with developing biological weapons against humans. Although smaller than Unit 731, Unit 100 was still a large organization. Its annual bacteria production capacity was projected to reach 1,000 kg of anthrax, 500 kg of glanders, and 100 kg of red rust (fungus). The goal was never reached, due to equipment shortages. Senior Sgt. Kazuo Mitomo described some of Unit 100's human experiments: "I put as much as a gram of heroin into some porridge and gave this porridge to an arrested Chinese citizen who ate it; about 20 minutes later he lost consciousness and remained in that state until he died 15-16 hours later. We knew that such a dose of heroin is fatal, but it did not make any difference to us whether he died or lived. On some of the prisoners I experimented 5-6 times, testing the action of Korean bindweed, bactal and castor oil seeds. One of the prisoners of Russian nationality became so exhausted from the experiments that no more could be performed on him, and Matsui ordered me to kill that Russian by giving him an injection of potassium cyanide. After the injection, the man died at once. Bodies were buried in the unit's cattle cemetery." Unit chief Yujiro Wakamatsu ordered Hirazakura to purchase hundreds of cattle and put them to pasture along the Siberian