The Sakai Line (境線, Sakai-sen) is a railway line operated by West Japan Railway Company (JR West) in Tottori Prefecture, Japan.

The section to Goto was electrified in 1982, and freight services ceased in 1986.

[citation needed] In 2008, Oshinozu Station was closed and the line relocated 800 m east to serve Yonago Airport, with the new station named accordingly.

[citation needed] JR West announced an 800 million yen renovation of the line's rolling stock (22 cars) in October 2017, to be completed by spring 2019.

Most stations on the line are unmanned, requiring fares to be paid to the train conductor; the upgrade is intended to increase efficiency, and to better serve travelers from Tokyo, Osaka and other metropolitan areas where proximity cards are commonly used.