History
Hirayamajōshi-kōen Station opened on 24 March 1925 as Hirayama Station, a stop on the Tama-Nan Electric Railway. The company was absorbed into the Keiō Electric Tramway on 1 December 1926. Wartime consolidation moved it under Tokyo Express on 31 May 1944, and the post-war demerger of 1 June 1948 placed it under Keiō Teito Electric Railway. The station was renamed Hirayamajōshi-kōen on 11 September 1955, taking the name of the nearby hilltop park along the Yaen-tōge hiking route, and was relocated to its present location on 23 October 1976.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
The 1955 name change references the Hirayama-jōshi (Hirayama-castle ruins) Park on the Yaen-tōge hiking course; the actual park is located across the city border in Horinouchi, Hachiōji, rather than Hino, where the station itself sits.