(unnamed)

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(unnamed) flows into the sea: 7 km flows in at N 34° 44′ 6″, E 137° 45′ 39″ at OSM node n735594639. 5 km flows in at N 34° 43′ 59″, E 137° 46′ 14″ at OSM node n735400070. 4 km flows in at N 34° 46′ 33″, E 137° 46′ 27″ at OSM node n2662694365. 952 m flows in at N 34° 44′ 19″, E 137° 45′ 48″ at OSM node n2052469711. 233 m flows in at N 34° 43′ 59″, E 137° 46′ 14″ at OSM node n735400070. 54 m flows in at N 34° 43′ 59″, E 137° 46′ 14″ at OSM node n735400070. (unnamed) flows into 貉川 , which it joins at the following points: 9 km of total upstream flows in at N 34° 45′ 48″, E 137° 45′ 42″ at OSM node n735198719 14 km of total upstream flows in at N 34° 45′ 16″, E 137° 45′ 23″ at OSM node n735586717 load it's distributaries

(unnamed) has 2 tributaries.

• 浜名用水路, which joins it at N 34° 48′ 42″, E 137° 47′ 13″ at OSM node n735934700, and 9 km of total upstream flows in.
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• 東原川, which joins it at N 34° 48′ 42″, E 137° 47′ 13″ at OSM node n735934700, and 2 km of total upstream flows in.
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