(unnamed)

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(unnamed) flows into 境川 , which it joins at N 31° 53′ 43″, E 131° 14′ 6″ at OSM node n739559453, and there 67 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 杉の本谷川, which joins it at N 31° 53′ 32″, E 131° 13′ 53″ at OSM node n742805778, and 7 km of total upstream flows in.
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• 和石谷川, which joins it at N 31° 53′ 39″, E 131° 14′ 3″ at OSM node n743113745, and 5 km of total upstream flows in.
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