 The station building is staffed, and also serves as the Iwaizumi Disaster Relief Centre as well as the Iwaizumi Tourist Information Centre.The station, originally named , opened on 1 April 1984.During the 11 March 2011 Tōhoku earthquake and tsunami, part of the tracks and the station building at Shimanoshi were swept away, suspending services on a portion of the Sanriku Railway.