The Sekinoo Potholes are one of the largest concentrations of such geological features in Japan.
The waterfall is fed by the Ōyodo River, which flows through the volcanic plateau of the Kirishima region.
The surrounding landscape is composed of Shirasu volcanic ash, a common geological material in southern Kyushu.
The site features a 23-meter-long suspension bridge that offers a direct perspective of the falls and the river basin.
Sekinoo Falls is a multi-tiered waterfall complex located on the Ōyodo River in Miyakonojō, Miyazaki Prefecture. The site consists of a 40-meter wide, 18-meter high main cascade alongside smaller side falls. The area is notable for its extensive collection of giant potholes, known as the Sekinoo Potholes, which are recognized as a Natural Monument of Japan. These geological formations were created over centuries by the swirling motion of stones and gravel in the riverbed. A suspension bridge crosses the river, providing an elevated view of the waterfall and the surrounding forest. The surrounding park includes stone paths and viewing platforms designed for river observation. The waterfall is situated within a volcanic landscape characterized by thick layers of pyroclastic flow deposits.
From the center of the suspension bridge for a panoramic view of the falls and the riverbed.
Wear shoes with good traction as the path near the potholes can be slippery when wet.
Cross the suspension bridge to access the walking trails that lead to the upper viewing areas.
Bring insect repellent during the warmer months as the lush, forested setting attracts mosquitoes.
Attempting to climb or swim in the pothole areas, as the river currents and slippery rock surfaces are dangerous.
Stay on marked paths to avoid damaging the delicate volcanic soil and geological formations.
