Kaikyō Line

The Kaikyō Line (海峡線, Kaikyō-sen) was an 87.8-kilometer-long (54.6 mi) railway line operated mainly by the Hokkaido Railway Company (JR Hokkaido). The line connected Naka-Oguni Station in Sotogahama, Aomori, through the Seikan Tunnel between Honshu and Hokkaido, to Kikonai Station in Kikonai, Hokkaido. Two stations on the Tsugaru-Kaikyō Line, Tappi-Kaitei Station and Yoshioka-Kaitei Station (both closed since 2014), were inside the tunnel.