The Sankō Line (三江線, Sankō-sen) is a former railway line and current bus line in western Japan operated by the West Japan Railway Company (JR West). The 108.1 km (67.2 mi) line connected Gōtsu in Shimane Prefecture to Miyoshi in Hiroshima Prefecture and featured 30 tunnels. Whilst the first section opened in 1930, the line was not completed until 1975. Owing to declining patronage, the entire rail line ceased operation on 31 March 2018, to be replaced by a bus service on 1 April 2018.