| Kai-Koizumi Station | |
| Style: | JR East |
| Native Name: | 甲斐小泉駅 |
| Native Name Lang: | ja |
| Address: | 2003 Koarama, Nagasaka-cho, Hokuto-shi, Yamanashi-ken 408-0031 |
| Country: | Japan |
| Coordinates: | 35.8796°N 138.3597°W |
| Operator: | JR East |
| Line: | Koumi Line |
| Distance: | 7.1 km from |
| Platforms: | 2 side platforms |
| Elevation: | 1,044 meters[1] |
| Opened: | 29 July 1933 |
| Passengers: | 22 |
| Pass Year: | FY2010 |
| Map Type: | Japan Yamanashi Prefecture#Japan |
| Map Dot Label: | Kai-Koizumi Station |
is a railway station in the Koumi Line in the city of Hokuto, Yamanashi Prefecture, Japan, operated by East Japan Railway Company (JR East).
Kai-Koizumi Station is served by the Koumi Line and is 7.1 kilometers from the starting point of the line at Kobuchizawa Station.
The station consists of two ground-level opposed side platforms, connected by a level crossing. The station is unattended.
Kai-Koizumi Station was opened on 27 July 1933 by the Japanese Government Railways. With the privatization of Japanese National Railways (JNR) on 1 April 1987, the station came under the control of JR East.
In fiscal 2010, the station was used by an average of 22 passengers daily (boarding passengers only).[2]