(unnamed)

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(unnamed) flows into the sea: 48 km flows in at N 34° 34′ 59″, E 137° 3′ 23″ at OSM node n727173344. (unnamed) flows into 豊島排水路 , which it joins at N 34° 36′ 8″, E 137° 2′ 34″ at OSM node n727001762, and there 55 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 豊川用水東部幹線, which joins it at N 34° 35′ 53″, E 137° 3′ 33″ at OSM node n727085787, and 93 km of total upstream flows in.
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