Norikura Kogen Onsen Shirakaba no Sho

Up on the Norikura Plateau, this inn pours a milky-white acidic sulfur spring into the baths around the clock, direct from the source. The water is unmistakably volcanic, white, cloudy, and distinctly sulfurous, which makes the high-altitude setting feel all the more remote. Guests frequently mention making the most of the baths multiple times a day.