Harajiri Falls runs from the Ogata River. It is about 20m tall and 120m wide. Usually, the water flows gently over the rock, but after the heavy rain, all the rocks will be the fall of water.
The rock is one large stab of rock made of a kind of stone known as Aso ignimbrite, the most common type of rock at Oita Bungo-ono Geopark.