The was a railway line in northern Japan that linked Aomori Station in Aomori Prefecture and Hakodate Station in Hokkaido between March 1988 and March 2016.
The Tsugaru-Kaikyà  Line was actually made up of portions of four separate lines: the East Japan Railway Company (JR East) Tsugaru Line and t Hokkaido Railway Company (JR Hokkaido) Kaikyà  Line, Esashi Line & Hakodate Main Line. The name was created in conjunction with the opening of the Kaikyà  Line and the Seikan Tunnel on 13 March 1988.
The line name has been out of use since 26 March 2016 when the Hokkaido Shinkansen opened and replaced all regular passenger services between Aomori and Hakodate. Of the four railway lines that formed the Tsugaru-Kaikyà  Line: the Tsugaru Line and the Hakodate Main Line sections continued to operate both freight and passenger trains, while the Kaikyà  Line became freight-only (until 2017 when the luxury excursion train Train Suite Shiki-shima commenced operation) and the Esashi Line was transferred to third-sector railway company South Hokkaido Railway Company.
JR East
JR Hokkaido
The actual junction of the Kaikyo Line and Tsugaru Line is ], past Naka-Oguni Station.
Limited Express trains operating on the Tsugaru-Kaikyà  Line included:
This article incorporates material from the corresponding article in the Japanese Wikipedia.