Rivers in Japan are classified according to criteria set by the River Act, which was introduced in 1967. Rivers are classified by the Ministry of Land, Infrastructure, Transport and Tourism.
Shinano River, the longest river in Japan, designated as Class A
The Nanakita River, a Class B river in Miyagi Prefecture
Kuma River (Japan)
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The Kuma River is a river in Kumamoto Prefecture, central Western part of Kyūshū, Japan. It is sometimes referred as Kumagawa River. It is the longest river in Kyushu, with the length of 115 km long a
Kuma River
Kuma River - splits into multiple channels before flowing to Yatsushiro Sea
Kuma River
Arase dam, located on the mainstream of Kuma River