The Shikoku Railway Company , commonly known as JR Shikoku , is the smallest of the seven constituent companies of the Japan Railways Group. It operates 855.2 kilometres (531.4 mi) of intercity and local rail services in the four prefectures on the island of Shikoku in Japan. The company has its headquarters in Takamatsu, Kagawa.

The Japan Railways Group, more commonly known as the JR Group or simply JR, is a group of railway companies in Japan that underwent division and privatization of the government-owned Japanese National Railways (JNR) on April 1, 1987. It consists of six passenger railway companies, one freight railway company, and two non-service companies. Most of the liability of the JNR was assumed by the JNR Settlement Corporation.