上古丹川

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上古丹川 flows into the sea: 4 km flows in at N 42° 2′ 45″, E 143° 6′ 4″ at OSM node n1204348685.

上古丹川 has 1 tributaries.

• (unnamed), which joins it at N 42° 2′ 57″, E 143° 6′ 19″ at OSM node n1204348611, and 863 m of total upstream flows in.
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