History
Sasagawa Station opened on 10 November 1931 as the temporary terminus of a Japanese Government Railways extension of the Narita Line from Sawara, handling both passengers and freight. When the line was pushed onward to Matsugishi on 11 March 1933 the station became an intermediate stop. The provisional working name during construction had been "Shimōsa-Sasagawa", and on opening the existing Sasagawa stations on the Tōhoku Main Line and Suigun Line were renamed Asakanagamori on 30 October 1931 to free the name. Freight and parcel handling ended on 1 October 1971, the station was absorbed into JR East at privatisation on 1 April 1987, joined the Tokyo suburban Suica area on 14 March 2009 and became fully unstaffed from 1 April 2021. In October 2024 the building was transferred to Tōnoshō town and reopened on 11 April 2026 as the Sasagawa Station Exchange Centre.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-09.
Where the English and Japanese sources differ, this account follows the Japanese source.
Notes
From its opening until around 1959, a roughly 710-metre siding ran from the station to the Iri-Masa soy-sauce works southeast of the platforms, carrying out soy sauce and bringing in soybeans, salt and boiler coal.