Have you seen the Ghibli movie "Spirited Away?" There is a ryokan, Japanese inn, which looks like the Yuya at Shibu Onsen near Jigokudani Monkey Park. I will tell you about it if you make inquiries.
Shibu Onsen has also nine traditional Onsen that only people staying there or living there are allowed to use and if you enter the nine, you can wash away your ordeals (kurou).