Aonuma Station opened on 28 December 1915 as the Irisawa Stop (入沢停留場?). It was elevated to a full station on 1 September 1934. The station was closed from 1944 to 1952. It was renamed to its present name on reopening on 1 March 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).