岩科川

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岩科川 flows into 那賀川 , which it joins at N 34° 45′ 5″, E 138° 46′ 29″ at OSM node n735496416, and there 44 km of total upstream flows in. load it's distributaries

岩科川 has 4 tributaries.

• (unnamed) , which joins it at the following points: 3 km of total upstream flows in at N 34° 43′ 16″, E 138° 48′ 44″ at OSM node n735717985 2 km of total upstream flows in at N 34° 43′ 16″, E 138° 48′ 44″ at OSM node n735717985
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• (unnamed), which joins it at N 34° 43′ 52″, E 138° 47′ 45″ at OSM node n735556772, and 1 km of total upstream flows in.
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• 山口川, which joins it at N 34° 44′ 11″, E 138° 46′ 47″ at OSM node n735300908, and 712 m of total upstream flows in.
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• (unnamed), which joins it at N 34° 43′ 28″, E 138° 48′ 21″ at OSM node n735940621, and 373 m of total upstream flows in.
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