|Main source||Mount Daisen
920 m (3,020 ft)
|River mouth||Sea of Japan
0 m (0 ft)
|River system||Omono River|
|Basin size||4,710 km2 (1,820 sq mi)|
|Length||133 km (83 mi)|
The Omono River (雄物川? Omono-gawa) is located in Akita Prefecture, Japan. The river flows from Mount Daisen on the border of Akita Prefecture with Miyagi and Yamagata Prefectures in the city of Yuzawa and drains into the Sea of Japan at the city of Akita. The river's drainage basin is essentially the entire southern half of Akita Prefecture. The river is free of dams for its entire length. It is regarded as a "first class river" in the Japanese river classification system.
- Japanese Ministry of Internal Affairs (1961). Japan statistical yearbook, Vol.12. Nihon Tōkei Kyōkai.
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Coordinates: (confluence with Ibi River)
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