平田温泉
(ひらたおんせん)
Allows entry with visible tattoos
97. Hirata Onsen, Beppu True grandpa onsen. No soap/shampoo or shower. An old man is nearby, but he just tells you to put 200 in the box (though he doesn't seem to be a random old man). Stamp available. Water in the bath is hot+, clear, comfortable to breathe. Couldn't find a mineral composition chart.