The train I boarded, "Tsubasa 127", was operated by E3 Series, which has been in service on Yamagata Shinkansen since 1999. The carriage set was L71.
At Oitama Station, the train stopped for an opposite-bound train pass for about three minutes.
While travelling, the train ran at a maximum speed of 130 km/80.78 mi per hour. I could see the scenery with greenish agricultural fields and mountains from the train window. Especially, the one between Akayu Station and Nakagawa Station was the most impressive for me.
The train arrived at Yamagata terminal on time.
I could travel by two types of "Tsubasa". Both of the two types of carriage for "Tsubasa" are in service at the same time by 2026. It was important for me to experience it.