The station building is a simple steel frame structure which serves only to house a waiting room and an automatic ticket vending machine.

[2][3] Japanese Government Railways (JGR) opened Haramizu as an additional station on the existing track of the then Miyagi Light Rail Line (宮地軽便線) (later the Miyagi Line) from Kumamoto eastwards to Higo-Ōzu.

By 1928, the track had been extended eastward and had linked up with the Inukai Line (犬飼線) which had been built westward from Ōita.

On 2 December 1928, the entire track from Kumamoto to Ōita was designated as the Hōhi Main Line.

With the privatization of Japanese National Railways (JNR), the successor of JGR, on 1 April 1987, the station came under the control of JR Kyushu.