Besshi Hot Spring
別子温泉 〜天空の湯〜べっしおんせん てんくうのゆ
Multi-bath complex with mountain-view rotenburo at a former copper mine park
Day Use
YesAdults (high school+) ¥700 weekday / ¥750 holiday (from Nov 1, 2025). Children ¥300. Seniors 65+ ¥600 weekday / ¥650 holiday. Ganbanyoku extra ¥500. Last entry 21:00. Shampoo/body soap not provided; bring own or buy on-site.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
Shared bathing area for all genders
Policies & Services
Welcomes children and families
Children under middle school age must be accompanied by a high school student or older. Children 7+ may not bathe together with the opposite sex (no mixed bathing for children 7+).
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Relaxation space for after bathing
On-site or nearby parking available
Views
MountainsHighlights
Ganbanyoku
Jet BathAbout
Tenkuu no Yu (天空の湯), meaning "sky bath," sits on the fourth floor of Maintopia Besshi (マイントピア別子), a tourist park built on the grounds of the historic Besshi Copper Mine. The complex runs two gendered bathhouses, Ki no Yu (木の湯) and Ishi no Yu (石の湯), which swap each week. Inside you get a main bath, jet and reclining tubs, a cold bath, and a sauna with auto-louré. Out on the rotenburo (露天風呂) deck there are carbonated and oxygen pools plus pot-shaped tsubo-yu (壺湯), all with a view out over the mountains. The water is real onsen, soft and faintly smooth on the skin. Ganbanyoku (岩盤浴), the heated stone-floor sauna, is available for a small extra charge.
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Last updated September 19, 2026