(unnamed)

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(unnamed) flows into 黒石川 , which it joins at the following points: 21 km of total upstream flows in at N 34° 51′ 6″, E 138° 18′ 59″ at OSM node n735465163 17 km of total upstream flows in at N 34° 50′ 58″, E 138° 18′ 20″ at OSM node n735824339 26 km of total upstream flows in at N 34° 51′ 5″, E 138° 19′ 23″ at OSM node n735833057 12 km of total upstream flows in at N 34° 50′ 53″, E 138° 17′ 45″ at OSM node n735910358 14 km of total upstream flows in at N 34° 50′ 56″, E 138° 17′ 50″ at OSM node n1760864645 load it's distributaries

(unnamed) has 0 tributaries.