Oirase River

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Oirase River
Oirase keiryuu.JPG
Oirase River gorge
Oirase River is located in Aomori Prefecture
Oirase River
Oirase River is located in Japan
Oirase River
Location of the mouth in Japan
Native name 奥入瀬川
Basin features
Main source Lake Towada
Aomori & Akita Prefectures, Japan
401 m (1,316 ft)
40°28′N 140°52′E / 40.467°N 140.867°E / 40.467; 140.867
River mouth Hachinohe
Pacific Ocean
0 m (0 ft)
40°36′28″N 141°27′40″E / 40.60778°N 141.46111°E / 40.60778; 141.46111Coordinates: 40°36′28″N 141°27′40″E / 40.60778°N 141.46111°E / 40.60778; 141.46111
Basin size 820 km2 (320 sq mi)
Physical characteristics
Length 67 km (42 mi)

The Oirase River (奥入瀬川, Oirase-gawa) is a river located in eastern Aomori prefecture, in the Tohoku region of northern Japan.

The Oirase River is the only river draining Lake Towada, a large caldera lake on the border of Aomori and Akita Prefectures. The river flows in a generally eastern direction, through the municipalities of Towada, Rokunohe, Oirase and Hachinohe before exiting into the Pacific Ocean. The upper reaches of the river form a scenic gorge with numerous rapids and waterfalls, and is one of the major tourist attractions of the Towada-Hachimantai National Park. The lower reaches of the river are used extensively for irrigation.

In 1996 the sound of flowing water at the Oirase River was selected by the Ministry of the Environment as one of the 100 Soundscapes of Japan.[1]



  • Campbell, Allen; Nobel, David S (1993). Japan: An Illustrated Encyclopedia. Kodansha. p. 1134. ISBN 406205938X. 

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