岩波川

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岩波川 flows into 島田川 , which it joins at N 35° 0′ 15″, E 137° 29′ 28″ at OSM node n727227975, and there 24 km of total upstream flows in. load it's distributaries

岩波川 has 2 tributaries.

• 木和田川, which joins it at N 35° 0′ 26″, E 137° 28′ 48″ at OSM node n727122313, and 6 km of total upstream flows in.
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• 鴨ヶ谷川, which joins it at N 34° 59′ 6″, E 137° 27′ 12″ at OSM node n727236725, and 3 km of total upstream flows in.
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