The Kaikyō Line is an 87.8 km railway line operated by Hokkaido Railway Company. The line connects Naka-Oguni Station in Sotogahama, Aomori, through the Seikan Tunnel connecting Honshu and Hokkaido, t
Kaikyō Line (Tappi-Kaitei - Tsugaru-Imabetsu) prior to the conversion to dual-gauge