Oshimizu

Known weekday departures: 139/day · Known Sat & holiday departures: 107/day

First / last known departure (weekday): 5:24 / 23:42

Busiest hour (known departures): 6:00–7:00 (9)

0:00 ─ 23:00

Figures are the departures known from the timetable data, not a count of today's actual service.

Timetable data as of 5 May 2026 (retrieved in spring/summer 2026).

• Toyohashi Railroad Atsumi Line: Mukougaoka ⇄ Oitsu

Ōshimizu Station opened on 22 January 1924 as a station on the Atsumi Electric Railway (the present-day Toyohashi Railroad Atsumi Line). It passed to Nagoya Railroad's Atsumi Line through the 1 September 1940 merger and was transferred to Toyohashi Railroad on 1 October 1954. A freight branch into the Toyohashi Spinning Mill was lifted in March 1969. From 18 May 2024 the station's weekend and holiday staffing window was shortened to close at 12:00.

Ōshimizu has two side platforms with a passing loop and is staffed only during set daytime hours, with the lavatory still a pit-style facility. The freight siding that used to lead from the station into the Toyohashi Spinning Mill has been gone for over half a century. Sagawa Express runs a training centre near the station, and the local commercial street fills up whenever a training course is in session; the Lake Town Fujimidai housing estate is linked to the station by the Toyotetsu Bus 'Lake Town' route.