Ashiyasu Onsen Iwazonokan
芦安温泉 岩園館あしやすおんせん いわぞのかん
Mountain ryokan with a big rock open-air bath
Lodging
Day Use
Yes10:00–15:30
¥1,000
Bathing only, 2 hours, 1,000 yen including tax. Group plans with a rest room and meals (3 or more people) cost 3,300 to 8,800 yen.
Bathing & Water
Natural onsen water
Uses natural hot spring water
Outdoor BathYes
Open-air outdoor bath
Indoor BathYes
Enclosed indoor bathing area
Bathing Arrangements
Mixed BathingNo
Shared bathing area for all genders
Policies & Services
ParkingYes
On-site or nearby parking available
About
A ryokan in the mountains of Ashiyasu with men's and women's baths kept separate. The one to go for is the big rock rotenburo, and there is an indoor bath as well. The water runs on the mild side, so it is an easy one to stay in for a long soak. Day visitors can use the baths too.
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Last updated October 11, 2026