[2]: 313 The Unit focused on plant and animal biological warfare, producing and deploying livestock and crop viruses in China.
Kazuo Mitomo described some of Unit 100's human experiments: Unit chief Yujiro Wakamatsu ordered Hirazakura to purchase hundreds of cattle and put them to pasture along the Siberian border north-east of Hailar, ready to be infected by airborne dispersion.
It was hoped that in the event of a Soviet invasion these infected livestock would mingle with local herds to cause epidemics and to destroy food supplies.
Unit 100 staff poisoned and drugged Russians, Chinese and Koreans with heroin, castor oil, tobacco and other substances for weeks at a time.
When survivors were determined to no longer be useful for experimentation and were complaining of illness, staff told them they would receive a shot of medicine, but instead executed them with potassium cyanide injections.