🌐EnglishEnglishBahasa IndonesiaEspañolSvenskaРусскийالعربيةفارسی한국어中文日本語EntityQ7887092· pop 10· linked from 19 articlesUnit Ei 1644Also known as Unit 1644Japanese biological warfare facility (1939–1945)Wikidata factsImageHeadquarter of Unit Ei 1644.jpgSources (3)he.wikipedia.orgwww3.nhk.or.jpwikidata.orgvia Wikidata · CC0Available in 10 languagesEspañol中文РусскийالعربيةBahasa IndonesiaHebrewSvenskaفارسی한국어via Wikidata sitelinks · CC0ConnectionsChinaCountrySingaporeCountryBeijingCategoriesBiological warfare facilitiesChemical warfareImperial Japanese ArmyJapanese biological weapons programJapanese human subject researchJapanese prisoner of war and internment campsJapanese war crimes in ChinaSecond Sino-Japanese WarWar crimes in the Second Sino-Japanese War