Returner (Japanese: リターナー, Hepburn: Ritānā) is a 2002 Japanese science fiction action film directed, co-written, and with visual effects by Takashi Yamazaki. It stars Takeshi Kaneshiro and Anne Suzuki, who must team up in present-day Japan to prevent an alien race from invading Earth. Goro Kishitani and Kirin Kiki are featured in supporting roles.

Production took place from circa January to April 2002. It reportedly aspired "to be a combination of Mission: Impossible, The Matrix and Leon", and exercised 300 computer-generated shots, as well as wire fu. The film was produced by Robot Communications and was funded by Robot, Toho, Fuji Television Network, Amuse Pictures, Shirogumi, and Imagica.

Returner premiered at Shibuya Public Hall on August 19, 2002, and was released in Japan on August 31. Samuel Goldwyn Films later distributed it in the United States on October 17, 2003. The film grossed over $11 million worldwide against a $4 million budget and was the fourteenth highest-grossing Japanese film of 2002. It received generally negative reviews from critics, with most attacking the screenplay and perceived lack of originality, although some praised the acting, action sequences, and visual effects. The film received five nominations at the 26th Japan Academy Film Prize. A sequel was planned but ultimately abandoned.