The Kisagi Basin is a bizarrely shaped shoal, located in the Sasano ravine in Kamitsue-machi, Hita, Oita Prefecture. The strangely shaped rocks and the massive rocks of the Hoshihara layer, which completely change the flow of the river, created the ravines near the Kantani Bridge. This bridge spans the middle reaches of the Kawahara River.

The natural landscape of the basin, which is some 20m wide, possesses a mysterious beauty. Its colors change subtly and marvellously with each season. Besides conifers, there are various broadleaf trees, such as chestnut, dogwood, soyogo and azebi, that enclose the Kisagi Basin, giving it the wonderful appearance of a botanical garden. The ambience of the Kisagi Basin becomes more vibrant in the autumn as the red leaves on the riverbank glow elegantly in the sunlight.

The Kisagi Basin is a lovely place, giving visitors a sense of joy, tranquility and harmony with nature.