Epidemic Prevention and Water Purification Department

Organization

• Unit 691 was under control of the Kwantung Army.
• * The central office of Unit 691 was Unit 731, infamous for its secret commitment to chemical and biological weapons and performing human experimentation. It had several branches, all of which were involved with biological warfare research:
• ** Unit 162
• ** Unit 643
• ** Unit 673
• ** Unit 319 was another sub-unit, which apparently were principally devoted to water purification.
• Unit 1855 was under control of the Japanese Northern China Area Army and performed human experimentation.
• Unit Ei 1644 or Tama Unit was under control of the Japanese Central China Area Army and performed human experimentation.
• * 12 different sub-Units
• Unit 8604 or Nami Unit was under control of the Japanese Southern China Area Army and performed human experimentation.
• Unit 9420 or Oka Unit, under control of the Southern Expeditionary Army Group and probably performed human experimentation.
• Unit 100 was operated by the Kempeitai, the Japanese military police. It was located in Mokotan, Manchukuo, a village just south of the city of Changchun.
• * Unit
• * Unit 543
• Unit 516
• * Unit 525
• * Unit 526
• Unit 160, possibly a typo.

Equipment