The station consists of a one ground-level side platform and one island platform serving three tracks, connected by a footbridge. The station is staffed.
Teradomari Station opened on 20 April 1913. It was renamed as Ōkozu Station (大河津駅, Ōkozu Station) on 1 October 1915. It reverted to its former name on 11 January 1986. With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR East.
Passenger statistics
In fiscal 2017, the station was used by an average of 177 passengers daily (boarding passengers only).[2]