Otaru Falls descends 34 meters at a place called Otaru in Yamamuro, part of the town of Ochi in Kochi Prefecture's Takaoka District — the waterfall and the spot on the map share the same name, written with characters meaning "great barrel." Ochi is one of several corners of inland Shikoku represented in the official Top 100 Waterfalls of Japan, a national selection that reached deep into Kochi's mountain valleys: three of the prefecture's falls made the list, and Otaru is one of them. The documentation on this cascade is spare, which is part of its character — a nationally recognized waterfall that has stayed largely a local landmark.
Visiting Otaru Falls
The falls are located at Otaru in Yamamuro, Ochi Town, Takaoka District, Kochi Prefecture. The provided sources say nothing about trails, platforms, or facilities, so check current access arrangements locally before visiting.