[2] Near the boundary between Ninohe and town of Ichinohe, the river passes through a valley with cliffs, rock formations and pools.

Geologically, the surrounding hills are composed of andesite and are the remnants of an ancient submarine volcano.

The ravine is flanked by a 280-meter monolithic cliff labelled the Ogami-iwa (男神岩) on one side, and the Megami-iwa (女神岩) on the other.

Nearby Mount Torigoe (鳥越山) (371.1 meters) is regarded as a holy mountain, and houses a statue of Kannon Bosatsu in a cave which is an object of pilgrimage.

These rock formations and the mountain have been designated a National Place of Scenic Beauty and Natural Monument since 2006.