山口川

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山口川 flows into 堀川 , which it joins at N 32° 38′ 14″, E 130° 10′ 55″ at OSM node n716119713, and there 15 km of total upstream flows in. load it's distributaries

山口川 has 3 tributaries.

• 中尾川, which joins it at N 32° 38′ 2″, E 130° 11′ 22″ at OSM node n716120079, and 4 km of total upstream flows in.
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• 大谷川, which joins it at N 32° 38′ 2″, E 130° 11′ 22″ at OSM node n716120079, and 3 km of total upstream flows in.
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• 七俣川, which joins it at N 32° 38′ 7″, E 130° 11′ 7″ at OSM node n716119771, and 2 km of total upstream flows in.
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