上古丹4号川

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上古丹4号川 flows into 上古丹川 , which it joins at N 44° 7′ 14″, E 143° 13′ 11″ at OSM node n1476337319, and there 57 km of total upstream flows in. load it's distributaries

上古丹4号川 has 2 tributaries.

• (unnamed), which joins it at N 44° 7′ 41″, E 143° 14′ 37″ at OSM node n1476342931, and 1 km of total upstream flows in.
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• (unnamed), which joins it at N 44° 8′ 5″, E 143° 15′ 9″ at OSM node n1476346480, and 494 m of total upstream flows in.
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