The Ki-27 and its derivates were the most commonly produced aircraft by Manshū
Manshū Aircraft Company (traditional:滿洲國飛行機製造株式會社; simplified: 満州国飛行機製造株式会社 JapaneseHepburn: Manshū Koku Hikōki Seizō Kabushiki Kaisha; Chinesepinyin: Mǎnzhōu Guó Fēixíngjī Zhìzào Zhūshì Huìshè) was an aircraft company in Manchukuo in the 1930s and 1940s, producing a variety of mostly military aircraft and aircraft components. It was named Manshū or Mansyû in short.
From 1941 to 1945, Manshū produced a total of 2,196 airframes (eighth among Japanese airframe manufacturers), of which 798 were combat aircraft. The company also produced 2,168 aircraft engines (sixth among Japanese aircraft engine manufacturers). In addition, Manshū provided repair services for a variety of aircraft in the Manchukuo Air Force and for Imperial Japanese Army Air Force units stationed in Manchukuo.