オップ沢

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オップ沢 flows into 大川目川 , which it joins at N 40° 26′ 29″, E 140° 21′ 39″ at OSM node n755222461, and there 33 km of total upstream flows in. load it's distributaries

オップ沢 has 1 tributaries.

• (unnamed), which joins it at N 40° 26′ 26″, E 140° 21′ 49″ at OSM node n755662014, and 154 m of total upstream flows in.
load it's tributaries