Immerse yourself in a scenic resort overlooking the Pacific, with a radon hot spring and sauna steeped in 1200 years of history
Kochi Tosashimizu City
"Ashizuri Thermae" is a scenic resort hotel located at Cape Ashizuri in Tosashimizu City, Kochi Prefecture. Its appeal lies in the chance to enjoy the natural radon hot spring of the Ashizuri Onsen district, which has a history of 1200 years and is said to have soothed even the legendary monk Kobo Daishi. The large public bath features an open-air bath overlooking the Pacific Ocean’s horizon, and at night you can enjoy a luxurious bathing experience under a sky full of stars. The sauna also offers sweeping ocean views, allowing you to refresh both body and mind in a space wrapped in silence. At the southernmost tip of Shikoku, you can spend a retreat-like moment and forget the everyday.
TypeNatural Hot Spring
A natural radon hot spring from the Ashizuri Onsen district, which boasts 1200 years of history. The spring quality is a simple weak radioactive cold mineral spring, known for its gentle feel on the skin. In the large public bath and open-air bath, you can fully enjoy this historic and celebrated spring associated with Kobo Daishi. Together with the spectacular view of the Pacific Ocean, it warms you from the core and gently eases away daily fatigue.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity6people
A dry sauna with a TV, heated by a gas stove. Its mild setting makes it easy for beginners to enter, while still allowing you to work up a good sweat at a relaxed pace. From the window, you can see the Pacific Ocean’s horizon and refresh yourself while taking in the spectacular scenery unique to Cape Ashizuri. In a space wrapped in silence, you can fully savor a deeply satisfying totonou experience.
Water QualityTap Water
Capacity2people
The cold plunge bath is essential for cooling down after the sauna. Its crisp, chilled water quickly tightens your overheated body. Though compact, the tub is deep enough to let you enjoy a refreshing sensation that envelops your whole body. After the cold plunge, you can spend a blissful moment in the open-air area, feeling the Pacific breeze during an outdoor air bath.
Closed Days: Open all year
1433-3 Aza-Higashihata, Ashizurimisaki, Tosashimizu City, Kochi Prefecture 787-0315
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 moreImmerse yourself in a scenic resort overlooking the Pacific, with a radon hot spring and sauna steeped in 1200 years of history
Kochi Tosashimizu City
"Ashizuri Thermae" is a scenic resort hotel located at Cape Ashizuri in Tosashimizu City, Kochi Prefecture. Its appeal lies in the chance to enjoy the natural radon hot spring of the Ashizuri Onsen district, which has a history of 1200 years and is said to have soothed even the legendary monk Kobo Daishi. The large public bath features an open-air bath overlooking the Pacific Ocean’s horizon, and at night you can enjoy a luxurious bathing experience under a sky full of stars. The sauna also offers sweeping ocean views, allowing you to refresh both body and mind in a space wrapped in silence. At the southernmost tip of Shikoku, you can spend a retreat-like moment and forget the everyday.
TypeNatural Hot Spring
A natural radon hot spring from the Ashizuri Onsen district, which boasts 1200 years of history. The spring quality is a simple weak radioactive cold mineral spring, known for its gentle feel on the skin. In the large public bath and open-air bath, you can fully enjoy this historic and celebrated spring associated with Kobo Daishi. Together with the spectacular view of the Pacific Ocean, it warms you from the core and gently eases away daily fatigue.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity6people
A dry sauna with a TV, heated by a gas stove. Its mild setting makes it easy for beginners to enter, while still allowing you to work up a good sweat at a relaxed pace. From the window, you can see the Pacific Ocean’s horizon and refresh yourself while taking in the spectacular scenery unique to Cape Ashizuri. In a space wrapped in silence, you can fully savor a deeply satisfying totonou experience.
Water QualityTap Water
Capacity2people
The cold plunge bath is essential for cooling down after the sauna. Its crisp, chilled water quickly tightens your overheated body. Though compact, the tub is deep enough to let you enjoy a refreshing sensation that envelops your whole body. After the cold plunge, you can spend a blissful moment in the open-air area, feeling the Pacific breeze during an outdoor air bath.
Closed Days: Open all year
1433-3 Aza-Higashihata, Ashizurimisaki, Tosashimizu City, Kochi Prefecture 787-0315
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