四古谷川

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四古谷川 flows into 佐波川 , which it joins at N 34° 16′ 59″, E 131° 39′ 35″ at OSM node n749412970, and there 82 km of total upstream flows in. load it's distributaries

四古谷川 has 1 tributaries.

• 下ヶ原川, which joins it at N 34° 17′ 1″, E 131° 39′ 16″ at OSM node n749579560, and 3 km of total upstream flows in.
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