The name 'Jion' originates from a Buddhist monk who reportedly practiced ascetic training at this location during the Edo period.
The waterfall is carved into a massive basaltic cliff, showcasing clear examples of vertical columnar jointing.
The cavern behind the waterfall provides a natural cooling effect, dropping ambient temperatures noticeably during summer months.
Local folklore suggests the area was once home to a dragon, a common motif in regional waterfall legends.
The site is often referred to as 'Jion-no-taki' in Japanese, which serves as a major landmark for the Kusu River valley.
Jion Falls is a 21-meter high waterfall located in Kusu, Oita Prefecture, known for the unique 'Ura-mi-no-taki' (viewing from behind) experience. The waterfall flows over a layer of volcanic rock, creating a hollow cavern behind the cascading water. A designated walking path allows visitors to traverse the space between the rock face and the falling water. The site is situated within the Yaba-Hita-Hikosan Quasi-National Park region. Local geology features distinct columnar joints formed by ancient volcanic activity. The waterfall remains accessible throughout the year, though water volume fluctuates significantly based on local rainfall patterns.
From the trail path directly behind the water curtain, capturing the silhouettes of the surrounding forest through the fall.
Wear non-slip footwear as the path behind the waterfall is constantly wet and can be slippery.
Bring a rain shell or waterproof jacket, as the mist behind the waterfall is heavy and will soak clothing.
Check local weather forecasts before visiting, as heavy rain can occasionally result in path closures for safety.
Do not attempt to climb the rock walls or venture off the path into the basin, as the currents are strong and rocks are unstable.
Open year-round, though the walking path may be temporarily closed during periods of heavy storm activity or flash flood warnings.
Stay on the marked walking paths to prevent erosion and protect the surrounding mossy rock formations.
