The station consists of one ground-level side platform serving a single bi-directional track. The platform is short, and can only accommodate trains of two carriages in length, therefore a door cut system is used. The station is unattended.
Namezu Station opened on 6 June 1916. The station was out of operation from 1944 through 1952. With the dissolution and privatization of JNR on April 1, 1987, the station came under the control of the East Japan Railway Company (JR East).