History
Okuōikojō Station opened in its current location on 2 October 1990, when a part of the Ōigawa Railway's Ikawa Line was relocated to avoid the reservoir created by the Nagashima Dam. Ōigawa Railway formally treats the station as a renamed and relocated successor to the submerged Inuma Station, dating its origins to 1959. The new station was built despite the absence of nearby residents specifically to draw tourists. A single side platform serves a single track, with a small shelter; the station sits on a cliff next to the Okuōi Reservoir and the platform extends partially onto a bridge spanning the lake. The two adjoining bridges are known together as the "Okuōi Rainbow Bridge".
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
When the lake level is low, the platform and tunnel of the submerged predecessor Inuma Station are still visible from above.