The is a river in Nara and Wakayama Prefecture in Japan. It is called in Nara. It is long and has a watershed of .
The river flows from Mount à Âdaigahara to the west. It pours into Kii Channel at Wakayama city.
The boundary between Nara prefecture and Mie prefecture is designated as the site where the river originates. The rainy season helped to create an Alluvial plain. The course of the river often changes, with frequent floods.
The JR West Wakayama Line partly runs parallel with the river.
Abundant water was useful for human settlement.
It was an area where the Koyasan, Kokawa and Mitsui temples were strong; centralized rule was impossible, until Nobunaga Oda suppressed the Saika Ikki.
The novelist Sawako Ariyoshi titled one of her books after the river.