落洞川

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落洞川 flows into 成沢川 , which it joins at N 35° 21′ 26″, E 136° 59′ 51″ at OSM node n727013138, and there 15 km of total upstream flows in. load it's distributaries

落洞川 has 4 tributaries.

• 物置洞川, which joins it at N 35° 21′ 29″, E 136° 59′ 55″ at OSM node n727082603, and 1 km of total upstream flows in.
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• (unnamed), which joins it at N 35° 21′ 36″, E 137° 0′ 26″ at OSM node n727091348, and 650 m of total upstream flows in.
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• (unnamed), which joins it at N 35° 21′ 33″, E 137° 0′ 36″ at OSM node n727128895, and 516 m of total upstream flows in.
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• (unnamed), which joins it at N 35° 21′ 36″, E 137° 0′ 16″ at OSM node n10901327331, and 353 m of total upstream flows in.
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