History
Ōnuma Station opened on 28 June 1903 when the Hokkaidō Railway extended its line north from Hongō to Mori. After nationalisation on 1 July 1907 it became a Japanese Government Railways stop, and on 12 October 1909 it was placed on the newly named Hakodate Main Line. The station was renamed Ikusagawa on 15 June 1920, then restored as Ōnuma on 1 June 1964. Freight services ended on 26 October 1971 and parcels on 1 February 1984. The depot was rebuilt in March 1982, and on 1 April 1987 operation passed to JR Hokkaido at the JNR split. The Midori-no-Madoguchi ticket counter closed on 17 March 2023, and the station became fully unstaffed the next day.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
From 1905 the local Numa-no-Ie shop sold its Ōnuma dango at the station; in-station hawking ended around 1993 and the on-train sales tied to the stop ceased with JR Hokkaido's withdrawal of onboard catering in 2019.