The Shikoku Railway Company (四国旅客鉄道株式会社, Shikoku Ryokaku Tetsudō Kabushiki-gaisha), commonly known as JR Shikoku (JR四国, Jei-āru Shikoku), is the smallest of the seven constituent companies of the Japan Railways Group (JR 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.

[2] In 1988 JR Shikoku, unlike other JR companies, discontinued the classification of its rail lines as either main, secondary, or branch lines.

Although this method is now widely used by rail companies, especially metro systems in Japan, JR Shikoku was the first JR company to adopt it.

JR Shikoku provides intercity transportation with its limited express services, connecting major cities on the island of Shikoku with Okayama on Honshū.