山形新幹線
The station opened on 15 February 1901 as . It was absorbed into the JR East network upon the privatization of JNR on 1 April 1987. Kaminoyama Station was renamed Kaminoyama-Onsen Station on 1 July 1992, coinciding with the opening of the Yamagata Shinkansen. A new station building was completed in June 2004.