大口川

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大口川 flows into 井川川 , which it joins at N 34° 46′ 34″, E 132° 1′ 30″ at OSM node n749703007, and there 21 km of total upstream flows in. load it's distributaries

大口川 has 2 tributaries.

• (unnamed) , which joins it at the following points: 136 m of total upstream flows in at N 34° 46′ 17″, E 132° 2′ 47″ at OSM node n749266639 260 m of total upstream flows in at N 34° 46′ 17″, E 132° 2′ 47″ at OSM node n749266639
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• 下大口川, which joins it at N 34° 46′ 31″, E 132° 1′ 45″ at OSM node n749883757, and 337 m of total upstream flows in.
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