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Yahagi River
Yahagi River
	Yahagi Dam Lake
Native name	矢作川 (Japanese)
Location
Country	Japan
Physical characteristics
Source
• location	Mount Ōkawairi
• elevation	1,908 m (6,260 ft)
Mouth
• location	Mikawa Bay
Length	117 km (73 mi)
Basin size	1,830 km2 (710 sq mi)
Discharge
• average	37.46 m3/s (1,323 cu ft/s)
Basin features
River system	Yahagi River

The Yahagi River (矢作川, Yahagi-gawa) is a river that flows from Nagano Prefecture's Mount Ōkawairi, through Gifu Prefecture, and enters Mikawa Bay from Aichi Prefecture in Japan.^[1] It is designated an A class river by the Ministry of Land, Infrastructure, Transport and Tourism (MLIT).

Geography

After flowing south from Mount Ōkawairi, the river enters Gifu Prefecture and forms the prefectural border with Aichi Prefecture between the cities of Ena and Toyota. Downstream, the Yahagifuru River (矢作古川 Yahagifuru-kawa) follows the original path of the river; however, the river was changed to its current path at the beginning of the Edo period because of flooding. The river forms the border between the cities of Nishio and Hekinan when it flows into Mikawa Bay.