(unnamed)

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(unnamed) flows into 豊川 , which it joins at N 34° 46′ 52″, E 137° 23′ 35″ at OSM node n727163793, and there 62 km of total upstream flows in. load it's distributaries

(unnamed) has 1 tributaries.

• 宮井戸川, which joins it at N 34° 46′ 54″, E 137° 23′ 35″ at OSM node n727233963, and 3 km of total upstream flows in.
load it's tributaries