History
Kōzaki Station opened on 1 April 1914 as the new southern terminus of the Hōshū Main Line, on the day Japanese Government Railways extended the line south from Ōita. It became a through-station on 15 August 1915 when the track was extended further south to Usuki. The Hōshū Main Line was renamed the Nippō Main Line on 15 December 1923. On 11 March 1946 the privately-operated Nippon Mining Saganoseki Railway opened with an interchange at Nikkō-Kōzaki, but that line was fully abolished on 15 May 1963. Control passed to JR Kyushu and JR Freight at the privatisation of Japanese National Railways on 1 April 1987, and freight service was discontinued in 1996. The current station building opened on 20 March 2009 after the 2008 demolition of its predecessor. The station became unstaffed on 26 March 2016 and gained Smart Support intercom assistance from 17 March 2018.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-22.
Notes
On 7 June 1949 the Shōwa Emperor's post-war imperial tour included two special imperial trains terminating or originating at Kōzaki — a Tomidaka-to-Kōzaki run and a Kōzaki-to-Beppu run.