History
Koiwa Station opened on 24 May 1899 as a stop on the privately owned Sōbu Railway, serving the rural fringe of what is now Edogawa, Tokyo. The line was nationalised under the 1906 Railway Nationalisation Act and brought into the state network on 1 September 1907; two years later the route was formally designated the Sōbu Main Line. The station was damaged in the 10 June 1945 air raid on Tokyo, and it passed from Japanese National Railways to JR East at the 1 April 1987 privatisation. Suica acceptance began on 18 November 2001, the JR East ticket counter (Midori no Madoguchi) closed on 28 February 2022, and smart-type platform doors entered service on 1 November 2020.
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
Inside the ticket gate stands a bronze statue of 44th yokozuna Tochinishiki, a Koiwa native and alumnus of the nearby Shimo-Koiwa Elementary School, which was unveiled on 25 December 1990 and is used by locals as a meeting point.