松井川

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松井川 flows into 紀の川 , which it joins at N 34° 15′ 36″, E 135° 23′ 28″ at OSM node n974638391, and there 1,227 km of total upstream flows in. load it's distributaries

松井川 has 2 tributaries.

• (unnamed) , which joins it at the following points: 656 m of total upstream flows in at N 34° 18′ 9″, E 135° 23′ 28″ at OSM node n974628398 765 m of total upstream flows in at N 34° 18′ 9″, E 135° 23′ 28″ at OSM node n974628398
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• 七反田川, which joins it at N 34° 16′ 39″, E 135° 23′ 41″ at OSM node n974475698, and 475 m of total upstream flows in.
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