Minami Matogahama onsen

116. Minami Matogahama onsen, Beppu A true old-school onsen. 200 yen in the box. No shower, shampoo/body wash, or staff. Stamp available. Inside there's a worn-out tub with clear water, temperature hot+. Breathing is fine, but there's a noticeable smell of wet rust (don't know how else to describe it).