Sailor Suit and Machine Gun (セーラー服と機関銃, Sērā-fuku to kikanjū) is a 1981 Japanese yakuza film directed by Shinji Sōmai, starring Japanese idol Hiroko Yakushimaru as the main character and based on the novel of the same name by Jirō Akagawa.

The title is a reference to a scene where the main character shoots several rival gang members with a submachine gun, while wearing a sailor-fuku, the traditional Japanese school uniform.

Sailor Suit and Machine Gun is relatively well known in its home country, and spawned two television series based on and expanding upon its story, one in 1982, and one in 2006.

[2] A "spiritual sequel", Sailor Suit and Machine Gun: Graduation, was released on March 5, 2016.

[3] The theme song of the film, "Sailor Fuku to Kikanjū", sung by the lead actress, Hiroko Yakushimaru, stayed at the 1st place of the weekly Oricon Singles Chart for five consecutive weeks, from December 21, 1981 (issue date) to January 18, 1982 (issue date).