History
Koiwai Station is on the JR East Tazawako Line in Takizawa, Iwate Prefecture, 10.5 kilometres from the line's terminus at Morioka. It opened on 25 June 1921 as a station on the Hashiba Light Railway operated by the Railway Ministry, predecessor of Japanese National Railways. The line was renamed Hashiba Line in September 1922 and reorganised as the Tazawako Line on 20 October 1966. Freight handling ended on 20 July 1974, parcel service on 1 February 1984, and the station became unstaffed on 1 November 1986. It joined JR East with the 1 April 1987 privatisation, was made fully unstaffed on 18 March 2023, and gained Suica acceptance on 27 May 2023. Akita Shinkansen trains pass without stopping.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
The wooden station building dates to 1921 and was restored in 2023 to its original appearance with a tile-clad roof and an expanded waiting room; ownership was simultaneously transferred from JR East to the city of Takizawa.