is a railway station in the city of Hanamaki, Iwate, Japan, operated by East Japan Railway Company (JR East).
Nitanai Station is served by the Kamaishi Line, and is located 3.5 kilometers from the starting point of the line at Hanamaki Station.
The station has a single island platform. The platforms are not numbered. The station is unattended.
Nitanai Station opened on 25 October 1913 as a station on the , a light railway extending 65.4 km from to the now-defunct . The line was nationalized in 1936, becoming the Kamaishi Line. The station was absorbed into the JR East network upon the privatization of the Japanese National Railways (JNR) on 1 April 1987.