久保川

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久保川 flows into 不老川 , which it joins at N 35° 53′ 33″, E 139° 29′ 7″ at OSM node n1021717749, and there 38 km of total upstream flows in. load it's distributaries

久保川 has 1 tributaries.

• (unnamed), which joins it at N 35° 52′ 10″, E 139° 26′ 47″ at OSM node n1047441320, and 3 km of total upstream flows in.
load it's tributaries