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Miya River (Mie)

The Miya River (宮川, Miya-gawa) is a major river that flows through central Mie Prefecture on the island of Honshū, Japan. It is officially classified as a Class 1 river by the Japanese government[1] and is one of four Class 1 rivers that flow solely through Mie; it is the longest among these four. It is known to be especially pristine. In the government's annual water quality study, the Miya River has been rated the cleanest Class 1 river in the country five times since 2000.
Source:   
Mouth:     
Length:  91 km (57 mi)[1]  
Basin size:  920 km2 (360 sq mi)[1]  

Miya River (Mie)  Click to go to Wikipedia