The Yamagata Shinkansen (山形新幹線) is a Mini-shinkansen route in Japan, operated by East Japan Railway Company. It provides service between Tokyo and Shinjō in Yamagata Prefecture over the tracks of the Tohoku Shinkansen and the Ōu Main Line.

The Tōhoku Shinkansen (東北新幹線) is a Japanese high-speed Shinkansen rail line, connecting Tokyo with Aomori in Aomori Prefecture in a route length of 674.9 km (419.4 mi), making it Japan's longest Shinkansen line. It runs through the more sparsely populated Tōhoku region of Japan's main island, Honshu, and was extended as the Hokkaido Shinkansen through the Seikan Tunnel to Shin-Hakodate-Hokuto and is expected to be extended to Sapporo by 2030. It has two Mini-shinkansen branch lines, the Yamagata Shinkansen and Akita Shinkansen. The line is operated by East Japan Railway Company.