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 one of Japan's first-class rivers.

Yahagi River
Yahagi Dam lake.jpg
Yahagi Dam Lake
Native name矢作川
Physical characteristics
 ⁃ locationMount Ōkawairi
 ⁃ elevation1,908 m (6,260 ft)
 ⁃ location
Mikawa Bay
Length117 km (73 mi)
Basin size1,830 km2 (710 sq mi)
 ⁃ average37.46 m3/s (1,323 cu ft/s)
Basin features
River systemYahagi River


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.

River CommunitiesEdit

Nagano Prefecture
Neba, Hiraya (Shimoina District)
Gifu Prefecture
Aichi Prefecture
Toyota, Okazaki, Anjō, Nishio, Hekinan

See alsoEdit


  1. ^ Toyota Yahagi River Institute. Toyota Yahagi River Institute. Accessed December 2, 2007.

External linksEdit

34°49′14″N 136°58′14″E / 34.820525°N 136.970667°E / 34.820525; 136.970667Coordinates: 34°49′14″N 136°58′14″E / 34.820525°N 136.970667°E / 34.820525; 136.970667 (mouth)