The Sagano Line is the popular name for a portion of the Sanin Main Line in the suburbs of Kyoto, Japan. The electrified and double-tracked railway is a commuter rail line in the Osaka-Kobe-Kyoto Metropolitan Area, owned and operated by West Japan Railway Company. The line starts at Kyoto Station and ends at Sonobe Station.

The Sanin Main Line is a railway line in western Japan, which connects Kyoto and Shimonoseki, Yamaguchi, operated by West Japan Railway Company. It is the major railway line of the San'in region, approximately paralleling the Japan Sea, crossing Kyoto, Hyōgo, Tottori, Shimane, and Yamaguchi prefectures. The main portion from Kyoto to Hatabu is the longest single continuous railway line in Japan at 673.8 km (418.7 mi), although no regularly scheduled train operates over the entire line.