The station building is a modern steel frame structure which houses a waiting area and an automatic ticket vending machine.

[2][3] Japanese Government Railways (JGR) had opened the Miyazaki Line from Yoshimatsu to Miyakonojō on 8 October 1913.

The track was extended east in phases, with Yamanokuchi opening as the new terminus on 15 August 1914.

On 15 December 1923, Yamanokuchi was designated as part of the Nippō Main Line together with the entire stretch through Miyazaki to Yoshimatsu.

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.