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The 11,900 square kilometres (4,600 sq mi) basin of the Shinano-Chikuma River system is the third largest in Japan and at 367 kilometres (228 mi), is the longest river in the country. The river system supports a population of around 3 million (as of 2009) and supports significant agriculture and electricity generation.
Rivers of Japan are characterized by their relatively short lengths and considerably steep gradients due to the narrow and mountainous topography of the country. An often-cited quote is 'this is not a river, but a waterfall' by the Dutch engineer ( o-yatoi gaikokujin ) Johannis de Rijke who had visited the Jōganji River , Toyama Prefecture .
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Koyoshi River (Japanese: 子吉川 （ こよしがわ ）, Hepburn: koyoshigawa) is a river in Akita Prefecture, Japan. It originates from Mount Chōkai , where the border of Akita Prefecture and Yamagata Prefecture is located, and flows through Yurihonjō and finally into Sea of Japan .
[6] [7] If a river system is designated Class A, all the constituent rivers are also designated as such. Therefore, Class B rivers cannot coexist with Class A rivers in the same river system. [7] This designation is also called First Class. Class A river (一級河川, Ikkyū kasen) is a designation which applies to important individual rivers ...
in Category:Rivers of Japan by prefecture. It should hold all the pages in the child categories, and may hold other pages such as lists.
The Ishikari River (石狩川, Ishikari-gawa), at 268 kilometres (167 mi) [1] long, is the third longest in Japan and the longest in Hokkaidō. The river drains an area of 14,330 square kilometres (5,530 sq mi), [ 1 ] making it the second largest in Japan, with a total discharge of around 14.8 cubic kilometres (3.6 cu mi) per year.
It can be thought of as a list of the biggest rivers on Earth, measured by a specific metric. For context, the volume of an Olympic-size swimming pool is 2,500 m 3 (88,000 cu ft). The average flow rate at the mouth of the Amazon is sufficient to fill more than 83 such pools each second.