The Tsubasa (つばさ) is a high-speed Shinkansen train service operated on the Yamagata Shinkansen by East Japan Railway Company since July 1992. The name was formerly used for a limited express service operated by Japanese National Railways (JNR) and later by JR East, which ran from Ueno to Akita, and was discontinued in 1992 when the new shinkansen service commenced.

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.