Koikawa Station began as  on September 30, 1944, and was elevated to a full station on the Japan National Railway (JNR), serving the town of Kado, Akita on February 1, 1950. It has been unattended since October 1971.
Koikawa Station commenced operations on September 30, 1944, and was upgraded to a full-fledged station by the Japan National Railway (JNR) on February 1, 1950. It has been unmanned since October 1971.