７なな３さん１いち部ぶ隊たい

noun

Unit 731

Historical term for the Imperial Japanese Army's biological warfare research unit.

• ７３１部ぶ隊たいは戦せん時じ中ちゅうに生せい物ぶつ兵へい器きの研けん究きゅうを行おこなっていた。

  Unit 731 conducted biological weapons research during the war.