Series E3-700 formation R18 debut on July 19, 2014. This train is the first resort train on the Shinkansen, "Toreiyu Tsubasa", was converted from one of the E3 Series trains used on the Akita Shinkansen "Komachi", with the theme of enjoying "food, hot springs, history, culture, and nature", while taking a walk like in the spa town. The interior of the train has been drastically modified with tatami mat seats, a bar counter, a lounge, and a footbath.

Currently, the Yamagata Shinkansen "Tsubasa" still operates once a day, mainly on weekends, between the conventional rail section from Fukushima, Yamagata to Shinjo.