山之口谷

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山之口谷 flows into 小川川 , which it joins at N 32° 16′ 22″, E 131° 11′ 57″ at OSM node n743134535, and there 9 km of total upstream flows in. load it's distributaries

山之口谷 has 1 tributaries.

• (unnamed), which joins it at N 32° 16′ 50″, E 131° 12′ 33″ at OSM node n739553979, and 134 m of total upstream flows in.
load it's tributaries