Kai-Koizumi

Departure data for this station is not available on this site.

Kai-Koizumi Station opened as a general station on 27 July 1933, when the section of the Japanese National Railways Koumi South Line (later the Koumi Line) between Kobuchizawa Station and this station was completed. The station's name derives from Koizumi Village, Kitakoma District, Yamanashi Prefecture, the village name at the time of opening. Freight handling was discontinued on 1 February 1963, parcel handling on 1 February 1986, and station staffing ended on 1 November of the same year, leaving it unstaffed. On 1 April 1987 it became a station of East Japan Railway Company (JR East) with the privatization and division of Japanese National Railways, and it was incorporated into the Greater Tokyo area on 1 April 2014. On 12 October 2020, with the introduction of a radio-based train control system applying ATACS, the passing-loop facilities were abolished, and the platforms, previously two opposing platforms serving two tracks, were reduced to a single platform serving one track on the former up-line side.

At an elevation of 1,044 meters, it ranks 7th among the highest JR stations nationwide, but unusually for a modern-era station, its building displays no Japanese-language station name sign.