All You Need Is Kill (Japanese: オール・ユー・ニード・イズ・キル, Hepburn: Ōru Yū Nīdo Izu Kiru) is a Japanese military science fiction light novel by Hiroshi Sakurazaka with illustrations by Yoshitoshi ABe. The novel was Sakurazaka's breakthrough science-fiction novel, earning wide praise from fellow novelists including Yasutaka Tsutsui and Chōhei Kanbayashi and was entered in contention for the Seiun Awards.