Day Use
YesAdult day-use bathing is ¥500 (junior high school and up), ¥300 for elementary school students, and free for infants. The private family bath is an extra ¥1,500 for 45 minutes on top of the day-use fee (free for overnight guests who book it through the site's stay plans).
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
Private bath available for day-use visitors or hotel guests to reserve
A reservable private family bath (貸切家族風呂); ¥1,500/45min for day-use guests, free for overnight guests booking via the site's stay plans.
Shared bathing area for all genders
Baths alternate between men's and women's use morning/evening — standard gender-separated layout, no mixed bathing mentioned anywhere.
Policies & Services
Shower, wash stations, soap and shampoo provided
Programs
About
Aobaso is a family-run inn in Norikura Kogen with milky, sulfur-scented water that runs straight from the spring without stopping. There are five baths in total: two indoor (one in cypress wood), two outdoor, and a reservable family bath, two of them named Aoba-no-yu (青葉の湯) and Keiryu-no-yu (渓流の湯). The men's and women's sides swap each morning and evening, so an overnight stay lets you try both. Day-use bathing is available, and the family bath can be booked on its own too. It's a handy base for trips into Kamikochi and Shirahone Onsen. The lobby has a wood stove for reading and relaxing, and the proprietress cooks with local ingredients.
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Reserve or check availability on a booking site.
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Last updated July 26, 2026