Sōya Main Line

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Sōya Main Line

The Sōya Main Line is a rural railway line in Hokkaido, Japan, operated by JR Hokkaido. It runs from Asahikawa in central Hokkaido to Wakkanai in the far north, making it Japan’s northernmost railway line.

Overview
- Length: about 259.4 kilometers with 36 stations.
- Gauge: 1,067 mm (standard in Japan).
- Route characteristics: mostly single-track, with double track only on the section from Asahikawa to Kita-Asahikawa.
- Electrification: overhead lines (20 kV AC) on freight sections near Asahikawa; passenger trains run on diesel.
- The line serves mainly rural areas and towns along the northern coast of Hokkaido.

Services
- Sōya Limited Express: daily service between Sapporo and Wakkanai.
- Sarobetsu Limited Express: daily service between Asahikawa and Wakkanai.
- Local services: all-stations trains operate between Asahikawa and Nayoro, and from Nayoro to Wakkanai at longer intervals.
- Rapid services: several Nayoro–Asahikawa rapid trains operate each day.

Stations and operations
- The line passes through many towns between Asahikawa, Nayoro, and Wakkanai.
- A number of stations have been closed or downgraded in recent years, and some remain unstaffed. Examples of closures (as of the 2020s) include Higashi-Rokusen, Hokusei, Kami-Horonobe, Kita-Kembuchi, Kita-Pippu, Minami-Bifuka, Minami-Pippu, Momponai, Onnenai, Toyoshimizu, Yasuushi, and several others. Some of these closures occurred in 2021–2025.

History
- The line began as part of a broader effort to connect the mainland with northern Sakhalin (Karafuto) routes; ferry links once connected Wakkanai to Sakhalin-era destinations.
- The first segment, from Asahikawa (then called Nagayama) toward Nayoro, opened in 1898, with expansion to other towns over the following years.
- The line was known at times as the Teshio Line or the Sōya Line before adopting the current name, Sōya Main Line.
- Over time, some branches and connecting routes were split off (notably the Tempoku Line to Wakkanai). After World War II, the line remained a key trunk route into northern Hokkaido.
- In 1987, Japanese National Railways was privatized, and JR Hokkaido took over the line. Since then, several sections and stations have been reduced or closed, and automation and centralized traffic control have reduced staffing on many parts of the line.
- In 2000, faster services began with the Super Sōya limited express service, reflecting attempts to improve travel times on this long northern route.

Looking ahead
- JR Hokkaido has discussed rationalizing the network, including potential changes to services and station status on the Sōya Main Line, in response to financial and demographic pressures in rural Hokkaido. Some sections and stations have already seen downgrades or closures as part of ongoing adjustments.

The Sōya Main Line remains an important link for communities in northern Hokkaido, connecting small towns to larger hubs and serving as a gateway to the remote northern coast.