is a railway station in the city of Saku, Nagano, Japan, operated by the East Japan Railway Company (JR East).
Iwamurada Station is served by the Koumi Line and is 70.6 kilometers from the terminus of the line at Kobuchizawa Station.
The station consists of two ground-level side platforms connected by a level crossing. The station is staffed.
Iwamurada Station opened on 8 August 1915. With the dissolution and privatization of Japanese National Railways on 1 April 1987, the station came under the control of the East Japan Railway Company (JR East).
In fiscal 2015, the station was used by an average of 1257 passengers daily (boarding passengers only).