Kame No Yu

185. Kame-no-Yu, Hakone Old-school onsen. Price 550, private bath is apparently 750 (didn't take it). Looks like they set up an onsen in a small old residential house. When I arrived, no staff was around, so I put 1000 in the box, grabbed tea from the fridge, and went to the onsen. Inside there's a small bath with clear water, temperature 42. Comfortable to breathe inside. When I was leaving, a man from the staff appeared and gave me my change. If you want an old-school experience in Hakone, worth visiting.