The Tsugaru-Kaikyō Line consists of both the red and blue segments
The Tsugaru-Kaikyō Line (津軽海峡線 Tsugaru-Kaikyō-sen) is a railway line in northern Japan linking Aomori Station in Aomori and Hakodate Station in Hokkaido.
The Tsugaru-Kaikyō Line is actually made up of portions of four separate lines: the Tsugaru Line, operated by East Japan Railway Company, and the Kaikyō, Esashi, and Hakodate Main lines, operated by Hokkaido Railway Company. The name was created following the opening of the Kaikyō Line and Seikan Tunnel on March 13, 1988.
Station and line divisions