The Atera River Valley is located in the Kiso area and it is just located about 30 minutes drive from the Tsumagojuku. The valley is naturally created and did not suffer any pollution. There is a rumor saying that using the water from the lake will help to keep your skin smooth.

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 In spring, there are many trees with green leaves and those leaves will turn into red leaves in autumn. Clean stream water coupled with the noises from the harves fly and birds, all contributing to a tranquil environment in this area. 

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Address: Nojiri-Aji National Forest, Oku-mura, Kiso-gun, Nagano Prefecture

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