Aonuma Station (青沼駅, Aonuma-eki) is a train station in the city of Saku, Nagano, Japan, operated by East Japan Railway Company (JR East).

[1] Aonuma Station is served by the Koumi Line and is 59.5 kilometers from the terminus of the line at Kobuchizawa Station.

[1] The station consists of one ground-level side platform serving a single bi-directional track.

[1] Aonuma Station opened on 28 December 1915 as the Irisawa Stop (入沢停留場).

[1] 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).