Library Wars (Japanese: 図書館戦争, Hepburn: Toshokan Sensō) is a 2013 Japanese film based on the light novel series Library War by Hiro Arikawa. Produced by Sedic International and distributed by Toho, the film was directed by Shinsuke Sato from a script written by Akiko Nogi. It stars Junichi Okada as Atsushi Dojo and Nana Eikura as Iku Kasahara, alongside Kei Tanaka, Sota Fukushi, Naomi Nishida, Jun Hashimoto, Kazuma Suzuki, Kazuyuki Aijima, Kyusaku Shimada, Kiyoshi Kodama, Chiaki Kuriyama, and Kōji Ishizaka. In the film, Kasahara joins the Library Defense Force, an organization tasked to protect libraries against the Media Betterment Committee from censorship, where she meets Dojo as her instructor.

A live-action film adaptation to be directed by Sato was announced in August 2012, along with the casting of Okada and Eikura. Filming began in September 2012 and concluded in December of that year, taking place at Saitama, Ibaraki, Yamanashi, and Fukuoka prefectures. Additional cast were revealed in November 2012. The film was completed in February 2013.

Library Wars premiered in Hong Kong on March 18, 2013, and was released in Japan on April 27. The film grossed ¥1.72 billion in Japan. A sequel, Library Wars: The Last Mission, premiered in 2015.