Irina
The star attraction that everyone comes to Nyuto for. As a result - crowds. But still worth it. It's off the beaten path - if you don't book their shuttle, it's a 40-50 minute walk from the bus stop through the forest in deep snow. Day-use from 10 to 15, 700 yen. A really great atmosphere and the water is also top-notch (similar to the water at Kyukamura, but more concentrated somehow). A huge mixed bath, the water is opaque and there's a nicely designed separate entrance into the water for women. 2 indoor baths, but of course everyone comes here for the konyoku. If you can only choose one onsen to visit in Nyuto, this is the one.