History
Koyasu Station opened on 24 December 1905 on the Keikyū Main Line, and was rebuilt with passing-loop tracks in March 1952 to give two island platforms serving four tracks. Limited-express calls were transferred to the next station, Kanagawa-Shimmachi, on 21 February 1965, demoting Koyasu first to express stops and then, after the 31 July 1999 timetable revision discontinued express runs south of Keikyū Kamata, to local trains only. Elevators were installed in 2007, connecting the underground concourse to the platforms via a new overpass. Keikyū introduced station numbering on 21 October 2010, assigning station number KK33. The station sits on a stretch of complex double-single line where the inbound side has two parallel tracks between Koyasu and Kanagawa-Shimmachi.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
When Keikyū renamed ten stations from "Keihin" to "Keikyū" on 1 June 1987, this stop kept its short name Koyasu; the road junction outside still carries the old company prefix on its sign as "Keihin Koyasu Station Entrance."