岩井川

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岩井川 flows into 奈佐川 , which it joins at N 35° 33′ 13″, E 134° 47′ 32″ at OSM node n969676715, and there 37 km of total upstream flows in. load it's distributaries

岩井川 has 2 tributaries.

• (unnamed), which joins it at N 35° 31′ 48″, E 134° 47′ 19″ at OSM node n970875683, and 2 km of total upstream flows in.
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• 河谷川, which joins it at N 35° 31′ 48″, E 134° 47′ 19″ at OSM node n970875683, and 913 m of total upstream flows in.
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