is a railway station in the city of Kiryà «, Gunma, Japan, operated by the third sector railway company Watarase Keikoku Railway.
Mizunuma Station is a station on the Watarase Keikoku Line and is 16.9 kilometers from the terminus of the line at .
The station has a two opposed side platforms connected by a level crossing. The station is unattended.
Mizunuma Station opened on 5 September 1912 as on the Ashio Railway. It was renamed to its present name on 1 June 1918.
In fiscal 2019, the station was used by an average of 99 passengers daily (boarding passengers only).