A sky spa inside Mintopia Besshi, proud of its carbonated spring and extensive open-air relaxation space
Ehime Niihama City
Besshi Onsen - Tenku no Yu is a bathing facility located in the Machideba area of the sightseeing spot Mintopia Besshi in Niihama, Ehime Prefecture. Two bathhouses, Kino-yu and Ishino-yu, alternate weekly for guests to enjoy. In addition to a sauna and a relatively deep cold plunge bath, the open-air area surrounded by nature features many deck chairs where you can enjoy open-air relaxation with an overwhelming sense of freedom. Besides the natural hot spring, the outdoor area also offers popular baths such as an artificial carbonated spring and an oxygenated spring.
TypeNatural Hot Spring
A sodium-calcium chloride-bicarbonate cold mineral spring. The main bath is filled with a refreshing-feeling hot spring. The outdoor area includes popular baths such as an artificial carbonated spring and an oxygenated spring, as well as small private soak tubs and reclining baths, so visitors can fully heal the fatigue of sightseeing or everyday life with a variety of baths.
Sauna TypeDry Sauna
Stove Typefar_infrared
A spacious dry sauna that can accommodate about 25–28 people. Although the displayed temperature is a mild 80°C to 86°C, the low ceiling means you will feel strong heat if you sit on the upper bench. The layout allows you to sweat comfortably while watching TV. The sauna room is clean and comfortable.
Water Qualitytap
The cold plunge bath is located immediately outside the sauna for an excellent flow. Water depth is 40–60 cm and the water temperature is around 18°C to 19°C. The smooth water quality is gentle, making it comfortable to stay in for a longer time. After cooling down in the cold plunge bath, head to the outdoor area. Surrounded by nature, the open-air space offers many fully flat deck chairs and benches where you can enjoy a blissful open-air relaxation time.
Closed Days: None
707-3 Tachikawa-cho, Niihama, Ehime 792-0846, Japan
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more
A sky spa inside Mintopia Besshi, proud of its carbonated spring and extensive open-air relaxation space
Ehime Niihama City
Besshi Onsen - Tenku no Yu is a bathing facility located in the Machideba area of the sightseeing spot Mintopia Besshi in Niihama, Ehime Prefecture. Two bathhouses, Kino-yu and Ishino-yu, alternate weekly for guests to enjoy. In addition to a sauna and a relatively deep cold plunge bath, the open-air area surrounded by nature features many deck chairs where you can enjoy open-air relaxation with an overwhelming sense of freedom. Besides the natural hot spring, the outdoor area also offers popular baths such as an artificial carbonated spring and an oxygenated spring.
TypeNatural Hot Spring
A sodium-calcium chloride-bicarbonate cold mineral spring. The main bath is filled with a refreshing-feeling hot spring. The outdoor area includes popular baths such as an artificial carbonated spring and an oxygenated spring, as well as small private soak tubs and reclining baths, so visitors can fully heal the fatigue of sightseeing or everyday life with a variety of baths.
Sauna TypeDry Sauna
Stove Typefar_infrared
A spacious dry sauna that can accommodate about 25–28 people. Although the displayed temperature is a mild 80°C to 86°C, the low ceiling means you will feel strong heat if you sit on the upper bench. The layout allows you to sweat comfortably while watching TV. The sauna room is clean and comfortable.
Water Qualitytap
The cold plunge bath is located immediately outside the sauna for an excellent flow. Water depth is 40–60 cm and the water temperature is around 18°C to 19°C. The smooth water quality is gentle, making it comfortable to stay in for a longer time. After cooling down in the cold plunge bath, head to the outdoor area. Surrounded by nature, the open-air space offers many fully flat deck chairs and benches where you can enjoy a blissful open-air relaxation time.
Closed Days: None
707-3 Tachikawa-cho, Niihama, Ehime 792-0846, Japan
Gender Access
Gender Separated
Curated by an expert who visits onsen and sauna facilities every day and has explored 300+ locations — only facilities confirmed to be truly exceptional are featured.
Learn more