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Kaikyō Line (海峡線 Kaikyō-sen?) is an 87.8-kilometre railway line operated mainly by the Hokkaido Railway Company (JR Hokkaido). The line runs from Naka-Oguni Station in Sotogahama, Aomori, through the Seikan Tunnel between Honshu and Hokkaido, and on to Kikonai Station in Kikonai, Hokkaido. Two stations on the Tsugaru-Kaikyō Line, Tappi-Kaitei Station and Yoshioka-Kaitei Station, are inside the Seikan Tunnel.
Several night train services use the Kaikyō Line between Honshu and Hokkaido; from Osaka, from Tokyo, and towards Hakodate and Sapporo. The daytime Super Hakuchō limited express service also runs on the Kaikyō Line.
- Naka-Oguni Station
- Tsugaru-Imabetsu Station
- Tappi-Kaitei Station
- Yoshioka-Kaitei Station
- Shiriuchi Station
- Kikonai Station
Three of the stations on the Kaikyō Line, Tappi-Kaitei, Yoshioka-Kaitei, and Shiriuchi, are scheduled to close from March 2014 due to construction work connected with the planned Hokkaido Shinkansen.
- "駅の営業終了について" [Station closure details] (pdf). News release (in Japanese). Japan: Hokkaido Railway Company. 13 September 2013. Retrieved 18 September 2013.