上岡川

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上岡川 flows into 四万十川(渡川) , which it joins at N 33° 10′ 48″, E 133° 0′ 42″ at OSM node n757086639, and there 477 km of total upstream flows in. load it's distributaries

上岡川 has 1 tributaries.

• (unnamed), which joins it at N 33° 11′ 19″, E 133° 1′ 6″ at OSM node n757377311, and 1 km of total upstream flows in.
load it's tributaries