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The Epidemic Prevention and Water Purification Department was a department of the Imperial Japanese Army from 1936 to the dissolution of the Army in 1945. While its public mission was to prevent the spread of disease and monitor water supply, several field armies also assigned units the mission of manufacturing biological weapons.〔『在満兵備充実ニ関スル意見』(April 23, 1936), a document addressed by Kwantung Army chief of staff Seishirō Itagaki to army general Yoshijirō Umezu. 「其三、在満部隊ノ新設及増強改編」の項目第二十三には「関東軍防疫部の新設増強予定計画の如く昭和十一年度に於いて急性伝染病の防疫対策実施および流行する不明疾患其他特種の調査研究 ならびに細菌戦準備の為関東軍防疫部を新設す 又在満部隊の増加等に伴い昭和十三年度の以降其一部を拡充す関東軍防疫部の駐屯地は哈爾賓附近とす」〕 Many units also performed human experimentation. ==Organization== The department was organized under the following system: * 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. * * * Unit 516 (Qiqihar), a chemical weapons division, operated secretly underneath Unit 731. * * * Other sub-units, which apparently were principally devoted to water purification, were Units 643, 162, 673, 543, and 319. * Unit 1855 (Beijing) was under control of the Japanese Northern China Area Army and performed human experimentation. * Unit Ei 1644 (Nanjing) was under control of the Japanese Central China Area Army and performed human experimentation. * Unit 8604 or Nami Unit (Guangzhou) was under control of the Japanese Southern China Area Army and performed human experimentation. * Unit 9420 or Oka Unit (Singapore), under control of the Southern Expeditionary Army Group and probably performed human experimentation. The 1996 book ''Germ Warfare Units'' (細菌戦部隊) contains testimonies that all of these units engaged in biological weapon development.〔「細菌戦部隊」 晩聲社 (1996/08). ISBN 489188259X〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Epidemic Prevention and Water Purification Department」の詳細全文を読む スポンサード リンク
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