41°22′28.16″N140°17′13.2″E / 41.3744889°N 140.287000°E /41.3744889; 140.287000

Kaikyō Line
Overview
Termini	Naka-Oguni Kikonai
Service
Type	Freight rail
Technical
Line length	87.8 km (54.6 mi)
Route map Legend Hokkaido Shinkansen toShin-Hakodate-Hokuto Dōnan Isaribi Tetsudō Line toHakodate Kikonai Shiriuchi Yoshioka-Kaitei Tappi-Kaitei Seikan Tunnel Tsugaru Line toMinmaya Okutsugaru-Imabetsu Tsugaru Line toAomori Naka-Oguni Tsugaru Line toMinmaya Tsugaru Line toAomori Hokkaido Shinkansen toShin-Aomori Map not to scale, may be missing some features

TheKaikyō Line (海峡線,Kaikyō-sen) is an 87.8 km (54.6 mi) railway line operated mainly by theHokkaido Railway Company (JR Hokkaido). The line connectedNaka-Oguni Station inSotogahama,Aomori, through theSeikan Tunnel betweenHonshu andHokkaido, toKikonai Station inKikonai, Hokkaido. Two stations on the Tsugaru-Kaikyō Line,Tappi-Kaitei Station andYoshioka-Kaitei Station (both closed since 2014), were inside the tunnel.

The approximately 82 km (51.0 mi) section of concrete-slab track-bed was built to accommodate theHokkaido Shinkansen, and isdual gauge, with both narrow (national standard)1,067 mm gauge and1,435 mm gauge track. As all regular passenger services areShinkansen, the Kaikyō Line is normally used only by freight trains.

The line was originally electrified at 20 kV AC (50 Hz) and was changed in 2016 to the Shinkansen-standard 25 kV AC (50 Hz).^[1] To continue freight operations,JR Freight introducedClass EH800 dual-voltage locomotives.

• Naka-Oguni Station
• Okutsugaru-Imabetsu Station (Shinkansen station with facilities for freight trains on the Kaikyō Line)
• Tappi-Kaitei Station (closed 2014)
• Yoshioka-Kaitei Station (closed 2014)
• Shiriuchi Station (closed 2014)
• Kikonai Station

The line was opened on 13 March 1988 in conjunction with the opening of the Seikan Tunnel. Originally the line ran both freight and passenger trains; the latter included daytime limited expressHakuchō and night trainHokutosei.

Three of the stations on the Kaikyō Line, Tappi-Kaitei, Yoshioka-Kaitei, and Shiriuchi, were closed on 15 March 2014 due to construction work connected with theHokkaido Shinkansen, which opened on 26 March 2016.^[2] From that time, this line has largely re-designed as a freight-only route, except for theTrain Suite Shikishima cruise train.

• Seikan Tunnel Tappi Shako Line

This article incorporates material from the corresponding article in the Japanese Wikipedia

• Lines of Hokkaido Railway Company
• Tsugaru-Kaikyō Line
• 1067 mm gauge railways in Japan
• Seikan Tunnel

• Pages using gadget WikiMiniAtlas
• CS1 Japanese-language sources (ja)
• CS1 uses Japanese-language script (ja)
• Coordinates on Wikidata
• Pages with no gauge entered in Infobox rail line
• Articles containing Japanese-language text