Kuma River is one of the three fastest rivers in Japan. It flows gently through Hitoyoshi basin. Once it debouches from the basin, however, it becomes a rapid which is worthy of being called one of the three fastest rivers.
no83504 Kuma River, the one of the Three Great Rapid Streams in Japan, has the calm current, but when the river exceeds the basin area, the current becomes suitable for name of Three Great Rapid Streams.
