(unnamed)

(unnamed) is 978 m long, and has a stream level of 2.

Map of (unnamed)

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(unnamed) flows into 大谷川 , which it joins at N 36° 45′ 0″, E 139° 37′ 13″ at OSM node n759048473, and there 106 km of total upstream flows in.

(unnamed) has 2 tributaries.

大谷川, which joins it at N 36° 45′ 8″, E 139° 36′ 42″ at OSM node n758748260, and 84 km of total upstream flows in.

赤沢川, which joins it at N 36° 45′ 8″, E 139° 36′ 58″ at OSM node n758922229, and 8 km of total upstream flows in.