魚山亭やまぶきぎょさんてい やまぶき
Alkaline baths at a quiet mountain ryokan
A day-use price of 800 yen was reported by a January 2026 visitor; not confirmed on the official site.
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
A private bath you can reserve for yourself or your group
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
A small ryokan up in the mountains at Nakagawa Onsen, with an indoor bath and an open-air bath set among trees, each split by gender on a time-swap rather than open to both at once (no mixed bathing, no private bath). The water is alkaline and runs a little silky on the skin, and it is known as "beauty water" (bijin no yu, 美人の湯) for leaving skin smooth. It is kept on the milder side rather than scalding. Guests describe the rotenburo as feeling like a walk in the woods, and the place stays low-key rather than resort-scale.
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Last updated September 29, 2026