History
Koizumimachi Station opened on 12 March 1917 as the terminus of the Chūgen Railway between Tatebayashi and Koizumimachi, in what is now the town of Ōizumi, Gunma Prefecture. The Chūgen Railway was renamed Jōshū Railway in 1922 and absorbed by Tōbu Railway in 1937. The branch line from Koizumimachi to Sengoku-Kashi opened on 13 April 1939, making the station an intermediate stop. Passenger services ceased on 10 May 1942 after Higashi-Koizumi Station and Nishi-Koizumi Station took over passenger traffic on the line, but were restored on 20 September 1955. The station is a single-side-platform unmanned halt with a PASMO simple ticket gate; station numbering as TI-45 was introduced in March 2012.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
Koizumimachi briefly lost all passenger service in 1942, when newly opened Higashi-Koizumi and Nishi-Koizumi stations absorbed the line's traffic; it took thirteen years for passenger trains to return on 20 September 1955.