Otaguchi

Known weekday departures: 8/day · Known Sat & holiday departures: 8/day

First / last known departure (weekday): 6:20 / 20:26

Busiest hour (known departures): 8:00–9:00 (2)

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 2 May 2026 (retrieved in spring/summer 2026).

• Dosan Line: Toyonaga ⇄ Tosaananai

Ōtaguchi Station opened on 28 October 1934 as an intermediate stop on what was then the Kōchi Line, operated by Japanese Government Railways. Located in the town of Ōtoyo in Kōchi Prefecture's Nagaoka District, the station sits 80.4 km from the Dosan Line's starting point at Tadotsu. The track curves through the station, so limited-express trains slow as they pass through. After successive transitions to Japanese National Railways and, upon the 1987 privatisation, to JR Shikoku, Ōtaguchi today operates as an unstaffed island-platform stop with a single passing siding, carrying the station number D30.

The station name comes from the sangō (honorific mountain title) of the nearby temple Buraku-ji, '大田山' (Ōtazan), whose Yakushi-dō hall is designated a National Treasure of Japan.