後山川

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後山川 flows into 丹波川 , which it joins at N 35° 47′ 15″, E 138° 57′ 51″ at OSM node n758667499, and there 135 km of total upstream flows in. load it's distributaries

後山川 has 4 tributaries.

• 三条沢, which joins it at N 35° 49′ 9″, E 138° 55′ 27″ at OSM node n758665064, and 10 km of total upstream flows in.
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• シオ沢, which joins it at N 35° 48′ 30″, E 138° 56′ 29″ at OSM node n758682853, and 5 km of total upstream flows in.
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• 片倉谷, which joins it at N 35° 47′ 56″, E 138° 57′ 14″ at OSM node n758806209, and 3 km of total upstream flows in.
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• (unnamed), which joins it at N 35° 49′ 9″, E 138° 55′ 27″ at OSM node n758665064, and 1 km of total upstream flows in.
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