 As such, the limited express trains "Super Hokuto" and "Hokuto" run between two cities once per 1 to 2 hours, as well as "Suzuran" between Sapporo and Muroran.As for the local service, the line is roughly divided into four sections, namely the section between Oshamambe and Higashi-Muroran, between Higashi-Muroran and Muroran, between Higashi-Muroran and Tomakomai, and between Tomakomai and Iwamizawa.The last section was once an important freight route, but became a quiet local line after coal mines closed.