Irie onsen

90. Irie Onsen, Beppu True grandpa onsen. No shower or soap. Entry 200 into a box. No stamp, but there's a paper stamp for pasting into your passport. Managed to visit before cleaning time (officially 10 to 12). Couldn't find a mineral composition chart. Inside there's one bath. Clear water, slightly cloudy, with a very small amount of brown mineral deposits. Temperature is hot-. Comfortable to breathe.