The Yamagata Shinkansen (山形新幹線) is a Mini-Shinkansen in Honshu, Japan. It provides service between Tokyo Station and Shinjo Station (in the city of Shinjo in Yamagata Prefecture) over the tracks of the Tohoku Shinkansen and the Oou Main Line . The segment from Fukushima to Yamagata opened on July 1, 1992, and the extension to Shinjo began operating on December 4, 1999. The term Yamagata Shinkansen refers to the segment that connects Fukushima Station (in the city of Fukushima, Fukushima Prefecture) and Shinjo Station.

Trains consist of seven coaches. Series 400 and series E3 rolling stock are in use. Between Tokyo Station and Fukushima Station, the trains run coupled to Yamabiko trains on the Tohoku Shinkansen. Between Fukushima and Shinjo, the trains run on their own.

The stations consist of those on the segment of the Tohoku Shinkansen plus the following:

• Yonezawa Station
• Takahata Station
• Akayu Station
• Kaminoyama Onsen Station
• Yamagata Station
• Tendo Station
• Sakurambo Higashine Station
• Murayama Station
• Oishida Station
• Shinjo Station