The station has one side platform, serving one bi-directional track.

Koyoshi Station opened on August 1, 1922 as the Tamanoike Signal Stop (玉ノ池停留場) on the Yokojō Railway.

The JGR became the Japan National Railway (JNR) after World War II.

[citation needed] Media related to Koyoshi Station at Wikimedia Commons

This Akita Prefecture railroad station-related article is a stub.