History
Atago Station opened on 1 July 1962, on the same day that the original Matsushima Station was retired. The Tōhoku Main Line between Iwakiri and Shinainuma had originally taken a steep mountain route via Rifu, but in 1944 a wartime coastal line was built as a freight bypass to ease the gradient and increase capacity. The new alignment took over as the main passenger route after the war, and on 1 July 1962 the old route between Iwakiri and Rifu was abandoned. Atago was built at JNR's expense as a substitute halt on the new line, sited close to the now-removed first Matsushima Station to placate residents of that neighbourhood. JR East inherited it at the 1 April 1987 privatisation, and Suica IC came in on 26 October 2003.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-10.
Notes
The earth-fill embankment beneath Atago's platforms hides a relic of the old line: the tunnel that runs directly under the station was originally used by the abandoned mountain route between Iwakiri and Rifu before the 1962 realignment.