Matt Canyon River Trekking Nishiwaga Town, Iwate Prefecture

The artificial lake "Nishikishu" in Nishiwaga Town, Iwate Prefecture, has a seasonal fluctuation in water level. The Mato Canyon is full of snowmelt water in spring and has a depth of about 20m, but during the dry summer season (July-September), the amount of water is below the knees. Observe the flora and fauna that can only be seen in this season as you pass through old bridges and valleys that emerge from the bottom of the water before it submerges in the dam.