The JR East Iwate-Numakunai Station has a four-story station building, with two elevated opposed side platforms on the fourth floor. The platforms have chest-high platform edge doors. The station has a Midori no Madoguchi staffed ticket office.
The adjacent Iwate Ginga Railway Station has a ground level island platform and a single side platform connected to the three-story station building by an overhead crossing. The station is staffed.
The station opened as Numakunai Station (沼宮内駅) on 1 September 1891. It was absorbed into the JR East network upon the privatization of the Japanese National Railways (JNR) on 1 April 1987 and was transferred to the Iwate Ginga Railway on 1 September 2002. Services on the Tohoku Shinkansen commenced 1 December 2002. The station was renamed Iwate-Numakunai at that time.
Passenger statistics
In fiscal 2018, the JR East portion of the station was used by an average of 83 passengers daily (boarding passengers only).[1] The Iwate Ginga Railway portion of the station was used by an average of 869 passengers daily.[2]
^各駅の乗車人員 (2018年度) [Station passenger figures (Fiscal 2018)] (in Japanese). Japan: East Japan Railway Company. 2019. Retrieved 11 May 2020.
^平成30年度 駅別乗降人員(1日平均) [Fiscal 2018 Station passenger figures (daily average)] (PDF) (in Japanese). Japan: Iwate Galaxy Railway Company. 2018. Archived from the original(PDF) on July 8, 2019. Retrieved 1 March 2020.
