上古丹川

上古丹川 is 4 km long, and has a stream level of 0.

Map of 上古丹川

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上古丹川 flows into the sea: 8 km flows in at N 42° 13′ 45″, E 139° 48′ 40″ at OSM node n1444489681.

上古丹川 has 2 tributaries.

クンジョ川, which joins it at N 42° 14′ 1″, E 139° 48′ 42″ at OSM node n1452758222, and 4 km of total upstream flows in.

イシヤ川, which joins it at N 42° 14′ 14″, E 139° 48′ 32″ at OSM node n1452759966, and 875 m of total upstream flows in.