History
The station opened on 1 April 1927 as Tsurumaki Station on Odakyu's new Odawara Line, taking the name Tsurumaki-Onsen on 15 March 1930 at the request of the local hot-spring association. In October 1944 wartime authorities ordered it back to plain Tsurumaki, viewing the 'onsen' suffix as frivolous during austerity; the spa name was not restored until 1 April 1958. Through later years semi-express and rapid-express services successively added the station to their stopping patterns. Station numbering as OH37 was introduced in January 2014. A relocated south exit with elevators and escalators entered service on 23 June 2018.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
Tsurumaki-Onsen's name was forcibly changed to plain 'Tsurumaki' during World War II because authorities considered the word 'onsen' too leisurely for wartime, and it took until 1958 to restore it.