The series takes place in an alternate version of Japan where the nationalized railway system was never privatized. Naoto Takayama is an ordinary high school student who aspires to a comfortable life working at Japanese National Railways. He ends up working as a security force trainee, where he unwillingly has to deal with his strange colleagues as well as RJ, a group of extremists who are fighting to privatize the railway.

Rail Wars! Nihon Kokuyū Tetsudō Kōantai (RAIL WARS! -日本國有鉄道公安隊-, lit. Rail Wars! Japanese National Railways Security Force) is a Japanese light novel series written by Takumi Toyoda with illustrations by Vania 600. As of February 2014, eight volumes have been published by Sohgeisha under their Sohgeisha Clear Bunko imprint. A manga adaptation titled Rail Wars! Nihon Kokuyū Tetsudō Kōantai The Revolver began serialization in Mag Garden's Blade Online in 2012. An anime adaptation began airing in July 2014.