東蓮田温泉 Higashihasuda Onsen
(ひがしはすだおんせん Higashihasuda Onsen)
103. Higashihasuda Onsen, Beppu True grandpa onsen without staff, shower, or shampoo/soap. Entry 200, stamp available. Couldn't find a mineral composition chart. Inside there's one small rectangular bath essentially for two people. Clear water, temperature is hot. Comfortable to breathe inside.