Kamegawa Sujiyu onsen

93. Kamegawa Sujiyu Onsen, Beppu True grandpa onsen. No staff, soap/shampoo, or shower. As far as I could tell you don't even need to pay since it's not posted anywhere — but I dropped 100 into the donation box. The onsen is literally in some garage or shed. Stamp available. Couldn't find a mineral composition sign. Inside there's one bath. Clear water with fine white mineral deposits. Temperature is hot-. The bath floor is wooden. Breathing is excellent. Only for old-school fans.