黒水川

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黒水川 flows into 小丸川 , which it joins at N 32° 9′ 52″, E 131° 27′ 18″ at OSM node n743709490, and there 331 km of total upstream flows in. load it's distributaries

黒水川 has 1 tributaries.

• (unnamed), which joins it at N 32° 11′ 30″, E 131° 26′ 19″ at OSM node n743843139, and 418 m of total upstream flows in.
load it's tributaries