Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Bathing Arrangements
Private bath available for day-use visitors or hotel guests to reserve
Two outdoor baths (せきれいの湯, かもしかの湯) are always free-of-charge private-use; the two indoor baths switch to private use on quiet days.
Private onsen bath in guest rooms, for overnight guests only
Rooms only list a washlet toilet/washbasin, not a bath; bathing is at the four shared/kashikiri baths described on the 天然温泉 page.
Shared bathing area for all genders
On busy days the two indoor baths run gender-separated; no mixed bathing is offered or advertised.
Policies & Services
Welcomes children and families
Room-rate page lists separate elementary-school and pre-school child pricing tiers.
On-site or nearby parking available
Views
Mountains
ForestPrograms
About
Keizanso is a small pension in Norikura Kogen, inside Chubu-Sangaku National Park at around 1,500 meters. It has four bath buildings and five tubs, all filled from the same milky, sulfur-rich spring. The two indoor baths, Konashi-no-yu (小梨の湯) and Sumomo-no-yu (すももの湯), are built entirely of wood with a high open ceiling; they're split by gender on busy days and open up for private use when it's quiet. The two open-air baths, Sekirei-no-yu (せきれいの湯) and Kamoshika-no-yu (かもしかの湯), are free for private use at any time, and Kamoshika-no-yu has a sauna next to it. The rotenburo look out over the surrounding mountains, and in season the guest room windows face fresh green forest.
Loading map…
Reserve or check availability on a booking site.
No reviews yet
Be the first to share your experience!
Last updated July 26, 2026