石原川

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石原川 flows into 市木川 , which it joins at N 31° 27′ 47″, E 131° 20′ 46″ at OSM node n742953150, and there 23 km of total upstream flows in. load it's distributaries

石原川 has 2 tributaries.

• (unnamed) , which joins it at the following points: 1 km of total upstream flows in at N 31° 27′ 53″, E 131° 19′ 47″ at OSM node n743660271 845 m of total upstream flows in at N 31° 27′ 53″, E 131° 19′ 47″ at OSM node n743660271
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• (unnamed), which joins it at N 31° 27′ 48″, E 131° 20′ 18″ at OSM node n742947080, and 727 m of total upstream flows in.
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