History
Iwakiri Station opened on 11 October 1888 as a station on the Nippon Railway, and on 16 April 1890 the line was extended from Iwakiri through Rifu to Ichinoseki. After nationalisation on 1 November 1906, the 1909 line-name reorganisation defined the Ueno-Iwakiri-Rifu-Aomori route as the Tōhoku Main Line and the Iwakiri-Shiogama section as the Shiogama Line. When the new "sea line" via Rikuzen-Sannō opened on 15 November 1944, the Shiogama Line's Iwakiri-Rikuzen-Sannō segment was absorbed into the Tōhoku Main Line. The station passed to JR East at the privatisation of Japanese National Railways on 1 April 1987, and a new elevated station building with a north-south concourse opened on 18 November 2018.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.