Iioka

Weekday departures: 54/day in the available timetable data · Sat & holiday departures: 52/day in the available timetable data

Earliest / latest departure in the available data (weekday): 5:11 / 23:54

Busiest hour in the available data: 7:00–8:00 (4)

0:00 ─ 23:00

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

Timetable data as of 2 May 2026 to 5 May 2026: the timetables behind these figures were retrieved on different dates.

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:

• Sobu Main Line: timetable covers only part of the line

• Sobu Main Line: Kurahashi ⇄ Asahi (Chiba)

Iioka Station opened on 1 June 1897 as a stop on the Sōbu Railway, which ran east from the Tokyo area towards Chōshi. The railway was nationalised in 1907 and absorbed into JR East at the breakup of Japanese National Railways on 1 April 1987. The station lies 106.3 km from the line's western terminus at Tokyo, in the city of Asahi, Chiba Prefecture. It consists of two opposed side platforms linked by a footbridge, and is staffed. In addition to the all-stations Sōbu Main Line services, the Shiosai limited-express trains running between Tokyo and Chōshi also call at Iioka.

Despite a modest ridership of only a few hundred boardings a day — an average of 733 in fiscal 2019 — Iioka is served by the Shiosai limited express, which has stopped here on every run since 14 March 2015.