The river is so clear and blue that it is called "Adera Blue". Ookuwa Village, Kiso Gun, Nagano Prefecture, Atera Keikoku, located in Mura, is famous for its beautiful emerald green river. The water is so clear that you can see the riverbed. Nagano prefecture, Kiso Gun Ookuwa Mura

From the entrance to Adera Gorge, you can walk along the river. Check out the photogenic spots, such as Kitsunegahuti, Tanukigahuti, Inugaerinohuti, and Rokudannotaki. You can also get close to the riverside, and feel the beauty of Japan's water. On and after rainy days, the water level rises. It is not safe to go near the river at those times.