(unnamed)

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(unnamed) flows into the sea: 2 km flows in at N 36° 20′ 14″, E 139° 24′ 13″ at OSM node n6196973221. (unnamed) has 2 distributaries.

• 渡良瀬川 , which it joins at the following points: 622 km of total upstream flows in at N 36° 19′ 55″, E 139° 25′ 51″ at OSM node n759187637. 619 km of total upstream flows in at N 36° 20′ 15″, E 139° 24′ 56″ at OSM node n4852952376. load it's distributaries
• 三栗谷用水 , which it joins at N 36° 19′ 5″, E 139° 26′ 27″ at OSM node n1596395789, and 3 km of total upstream flows in. load it's distributaries

(unnamed) has 0 tributaries.