Onjuku

Weekday departures: 18/day in the available timetable data · Sat & holiday departures: 16/day in the available timetable data

Earliest / latest departure in the available data (weekday): 6:50 / 22:26

Busiest hour in the available data: 8:00–9:00 (2)

0:00 ─ 23:00

Figures are typical departures in the timetable data, not a live service count.

Timetable data as of 2 May 2026.

The timetable data is incomplete for some or all lines at this station, so the weekday and Sat & holiday figures are departures in the available timetable data, not totals.

Lines where the timetable data is incomplete:

• JR Sotobo Line: only trains from timetables filed under other lines

• JR Sotobo Line: Ohara (Chiba) ⇄ Katsuura

Onjuku Station opened on 20 June 1913 on what is now the Sotobō Line in the town of Onjuku, Chiba Prefecture. Freight handling was withdrawn on 1 July 1971 and parcel handling on 1 March 1972. The station passed to JR East at the privatisation of Japanese National Railways on 1 April 1987 and was integrated into the Tokyo suburban network when Suica IC-card ticketing began on 14 March 2009. From the 16 March 2013 timetable revision all Wakashio limited-express services have stopped here. The staffed Midori-no-Madoguchi reservation window closed on 31 May 2022, and the station is now a contract-operated station staffed by JR East Station Services under the Mobara Integrated Station Center, through Katsuura Station. It lies 65.4 km from Chiba.

The station name plaque incorporates a motif from the children's song "Tsuki no Sabaku" ("Moonlit Desert"), associated with Onjuku beach, and a statue of an ama diver stands toward the Chiba end of the platform.