Before We Vanish (散歩する侵略者, Sanpo Suru Shinryakusha, transl. "Strolling Invaders") is a 2017 Japanese science fiction film directed by Kiyoshi Kurosawa. It is based on a stage play by Tomohiro Maekawa's Ikiume Theatre Company and the novel adaptation written by Maekawa. It stars Masami Nagasawa, Ryuhei Matsuda, Mahiro Takasugi, Yuri Tsunematsu, and Hiroki Hasegawa.

Before We Vanish earned two nominations at the 41st Japanese Academy Film Prize. The film had its world premiere in competition at the Un Certain Regard section at the 2017 Cannes Film Festival on 21 May 2017. The film also received an award at the Sitges Film Festival – Official Selection.