(unnamed)

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(unnamed) flows into 野内川 , which it joins at the following points: 50 km of total upstream flows in at N 40° 50′ 27″, E 140° 49′ 11″ at OSM node n753275910 50 km of total upstream flows in at N 40° 50′ 27″, E 140° 49′ 11″ at OSM node n753275910 load it's distributaries

(unnamed) has 2 tributaries.

• 野内川, which joins it at N 40° 49′ 22″, E 140° 52′ 13″ at OSM node n753049317, and 74 km of total upstream flows in.
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• 大辺田貝川, which joins it at N 40° 49′ 28″, E 140° 50′ 45″ at OSM node n753590826, and 11 km of total upstream flows in.
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