Blissful bathing with sulfur-scented 100% free-flowing source water and a full-fledged sauna
Tochigi Otawara City
"Sakuyama Onsen Kiminoyu" is a natural hot spring facility located amid the peaceful scenery of Sakuyama in Otawara City, boasting exceptionally fresh spring water. The source spring, which rises from underground, is an alkaline simple hot spring with a sulfur aroma, offered as 100% free-flowing water with no added water and no heating. It is highly regarded as a skin-smoothing beauty bath, with a distinctive silky feel that is one of its proudest features. It also features a full-fledged sauna and cold plunge bath. It is a renowned hot spring that satisfies even serious onsen fans, allowing you to enjoy authentic hot spring power and a proper sauna at the same time.
TypeNatural Hot Spring
An alkaline simple hot spring rising from underground, with a sulfur aroma. It is offered as 100% free-flowing source water with no added water, no heating, and no circulation, allowing you to feel the spring’s rich natural qualities on your skin. Its strong alkalinity above pH 9.0 helps remove old dead skin cells and leaves your skin moist and smooth. An exquisite bath where you can savor the true power of the hot spring with all five senses.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A high-temperature dry sauna wrapped in the warmth of wood, prized for its powerful heat. With its stable high-heat setting, it promotes deep sweating efficiently in a short time.
Water QualityTap Water
Capacity5people
A crisp, cold cold plunge bath that instantly refreshes your body after the sauna. Gentle on the skin, it helps calm your heart rate while letting you enjoy a blissful cool-down. It is also spacious enough for a relaxed soak.
Closed Days: None
324-0032 Tochigi Prefecture, Otawara City, Sakuyama 2508
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
Blissful bathing with sulfur-scented 100% free-flowing source water and a full-fledged sauna
Tochigi Otawara City
"Sakuyama Onsen Kiminoyu" is a natural hot spring facility located amid the peaceful scenery of Sakuyama in Otawara City, boasting exceptionally fresh spring water. The source spring, which rises from underground, is an alkaline simple hot spring with a sulfur aroma, offered as 100% free-flowing water with no added water and no heating. It is highly regarded as a skin-smoothing beauty bath, with a distinctive silky feel that is one of its proudest features. It also features a full-fledged sauna and cold plunge bath. It is a renowned hot spring that satisfies even serious onsen fans, allowing you to enjoy authentic hot spring power and a proper sauna at the same time.
TypeNatural Hot Spring
An alkaline simple hot spring rising from underground, with a sulfur aroma. It is offered as 100% free-flowing source water with no added water, no heating, and no circulation, allowing you to feel the spring’s rich natural qualities on your skin. Its strong alkalinity above pH 9.0 helps remove old dead skin cells and leaves your skin moist and smooth. An exquisite bath where you can savor the true power of the hot spring with all five senses.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity10people
A high-temperature dry sauna wrapped in the warmth of wood, prized for its powerful heat. With its stable high-heat setting, it promotes deep sweating efficiently in a short time.
Water QualityTap Water
Capacity5people
A crisp, cold cold plunge bath that instantly refreshes your body after the sauna. Gentle on the skin, it helps calm your heart rate while letting you enjoy a blissful cool-down. It is also spacious enough for a relaxed soak.
Closed Days: None
324-0032 Tochigi Prefecture, Otawara City, Sakuyama 2508
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