Karatsu Line
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 (now ). 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 (JGR) took over control of the station. On 12 October 1909, the line which served the station was designated the Karatsu Line.