Unit 100 had six sections . 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
Unit 731
Unit 731
Unit 100