The Tosa Kuroshio Railway Sukumo Line (土佐くろしお鉄道宿毛線, Tosa Kuroshio Railway Sukumo-sen) is a 23.6 km Japanese railway line operated by the third-sector railway operator Tosa Kuroshio Railway.

It connects Nakamura Station in the city of Shimanto with Sukumo Station in the city of Sukumo in Kōchi Prefecture.

The Tosa Kuroshio Railway was established on 8 May 1986 for the purpose of resuming construction of the Sukumo and Asa lines, which had been planned by JNR but abandoned.

[1] The company acquired a license to operate the Sukumo Line in February 1987, and commenced construction of the line, which opened on 1 October 1997.

[1]