The Mine Line (美祢線 Mine-sen?) [mĩe] is a railway line of West Japan Railway Company connecting San'yō-Onoda and Nagato within Yamaguchi Prefecture, Japan.
The Sanyo Railway Co. opened the Asa - Minami-Omine section in 1905 to haul coal. The company was nationalised in 1906, and the Japanese Government Railway (JGR) extend the line to Mine in 1909.
The Mine Light Railway Co. opened the Mine - Shigeyasu section in 1916. That company was nationalised in 1920, and the JGR opened the section to Ofuku the same year. The line was extended to Nagato in 1924, completing the line.
Freight services ceased in 1984, except for limestone haulage from Shigeyasu, which ceased in 2009.
Due to heavy rainstorm flooding in July 2010, service was suspended. Despite estimates that repairs would take up to 3 years to complete, the Mine Line was restored to full service on September 26, 2011, in time for the 66th National Sports Festival, "Oidemase Yamaguchi Kokutai," which began in October 2011.
All stations are in Yamaguchi Prefecture.