上イラ沢

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上イラ沢 flows into 奈良沢川 , which it joins at N 36° 57′ 7″, E 139° 1′ 47″ at OSM node n760043209, and there 33 km of total upstream flows in. load it's distributaries

上イラ沢 has 1 tributaries.

• (unnamed), which joins it at N 36° 57′ 19″, E 139° 2′ 14″ at OSM node n759541285, and 764 m of total upstream flows in.
load it's tributaries