The station is served by the Karatsu Line and is located 32.9 km from the starting point of the line at. The station is also the starting point for the western section of the Chikuhi Line to. Trains of the Chikuhi Line use the Karatsu Line tracks from to here before rejoining the Chikuhi Line track towards Imari.
Station layout
The station consists of a side and an island platform serving three tracks at grade with two sidings branching off track 1. The station building is an old timber structure of traditional Japanese design with a double tiled roof. It is unstaffed and serves only to house a waiting room and an automatic ticket vending machine. Access to the island platform is by means of a level crossing with steps.
Adjacent stations
History
On 1 December 1898, the private Karatsu Kogyo Railway opened the station as the southern terminus of a track which it had built down the west bank of the Matsuura River from Miyoken. Yamamoto became a through-station on 13 June 1899 when the track was extended to. On 23 February 1902, the company, now renamed the Karatsu Railway, merged with the Kyushu Railway. When the Kyushu Railway was nationalized on 1 July 1907, Japanese Government Railways took over control of the station. On 12 October 1909, the line which served the station was designated the Karatsu Line. The private Kitakyushu Railway, which had a track between and by 1926 also expanded southwards a separate, parallel route down the east bank of the Matsuura River, establishing its southern terminus at Yamamoto on 20 June 1929. By 1935, the track had been extended west from Yamamoto to. The Kitakyushi Railway was nationalised on 1 October 1937 and JGR, now in control, designated the track from Higashi-Karatsu through Yamamoto to Imari as part of the Chikuhi Line. For many years thereafter, Yamamoto was the only transfer station between the Karatsu and Chikuhi Line. On 22 March 1983, a new route for the Chikuhi Line was opened, with Highashi-Karatsu relocated and a through-track built across the Matsuura River from there via to Karatsu. The stretch of track from Higashi-Karatsu down the east bank of the Matsuura River was closed. Chikuhi Line trains now used the Karatsu Line track down the west bank from Karatsu to reach Yamamoto before rejoining the western section of Chikuhi Line to Imari. With the privatization of Japanese National Railways, the successor of JGR, on 1 April 1987, control of the station passed to JR Kyushu. Yamamoto was also the terminal for a number of branch lines which have since closed. A branch to Ōchitankō opened in 1905 for freight closed in 1978. Another freight line to Kanokuchi opened in 1909 and closed in 1912. A branch to Kishitake opened in 1912 and closed in 1971.
Passenger statistics
In fiscal 2015, there were a total of 114,541 boarding passengers, giving a daily average of 314 passengers.
