A simple sulfur hot spring (slightly acidic, pH4.1) drawn over a distance of about 2 km from the site of the explosive crater of Iwakiyama’s Inugurayama. It is known for its bluish milky water and pleasant sulfur aroma, and has long been cherished as a healing bath said to help with a wide range of ailments. The water is fresh, directly from the source, with only water added to adjust the temperature, and no filtration or circulation is used. Guests can fully enjoy Amihari’s famous waters in a variety of indoor baths and open-air baths, including the main building’s Daishaku no Yu, the Hakusen no Yu that retains the atmosphere of a therapeutic hot spring inn, and the day-use facility’s Yakushi no Yu.

About a 7-minute walk from the main building along a mountain path through a beech forest, this rustic mixed-gender open-air bath sits beside a mountain stream and is closed in winter due to snow. Secluded in the midst of nature, it is an ultimate healing spot where you can enjoy forest bathing and a milky hot spring bath at the same time while listening to the nearby stream and the songs of birds.