The section between Kikonai and Esashi closed in May 2014, and the remainder was transferred to third-sector operator South Hokkaido Railway Company in March 2016 following the opening of the Hokkaido Shinkansen.

The Kikonai to Yunotai section opened on 10 December 1935, and was extended to Esashi on 10 November 1936.

The Goryokaku to Kikonai section was electrified on 13 March 1988 as part of the upgrading of the line associated with the opening of the Seikan Tunnel and associated Kaikyo Line linking Hokkaido to Honshu.

On 7 August 2012, JR Hokkaido announced its intention to close the 42 km (26 mi) non-electrified section of the line between Kikonai and Esashi in spring 2014 due to a lack of financial viability.

[1] In fiscal 2011, the Kikonai to Esashi section was served by six return services daily, with an average patronage of 41 passengers per km daily, the lowest for any of JR Hokkaido's lines.