A highly alkaline beauty spring and authentic sauna wrapped in the quiet of the forest and the murmur of the river
Kanagawa Minamiashigara City
"Modern Touji Only You" is a day-use hot spring facility nestled deep in the forests of Minamiashigara, Kanagawa Prefecture, built around the concept of harmony with nature. Its highly alkaline simple spring water, with a pH of 9.5, gushes from 200 m underground and is known as a beauty bath for its silky, smooth feel on the skin. Following a renovation in 2024, the sauna area now features Vihta Sauna, equipped with auto löyly, and Ruska Sauna, which offers self-löyly with a view of the river. With a cold plunge bath using luxurious Hakone groundwater and an outdoor bathing area where you can feel the forest air and the murmur of the river with your whole body, you can deeply soothe both body and mind in an immersive setting you could never experience in the city.
TypeNatural Hot Spring
A sodium chloride and sodium bicarbonate spring with a very high alkalinity of pH 9.5. It is cherished as a beauty bath that helps remove dead skin cells and leaves the skin smooth. With two temperature settings, 38°C and 41°C, you can enjoy a long soak while gazing out at the forest scenery, slowly releasing both physical and mental tension.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A sauna room filled with the scent of vihta. The powerful heat stimulates the entire body and encourages deep sweating. The compact room retains heat well, creating a strong setup that sauna enthusiasts will appreciate. Along with the soothing aroma of vihta, you can enjoy an authentic Finnish-style experience.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity5people
A meditation sauna newly installed in the men's open-air area, where self-löyly is possible. From the sauna room window, you can watch the flow of the Kasumigawa River and enjoy a sense of unity with nature. By adjusting the humidity at your own pace, you can spend a quiet, meditative time facing yourself, making this a luxurious space unique to Only You.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity1people
A cold plunge bath that makes lavish use of Kinran Water, drawn from 200 m underground in the Hakone water system. It is characterized by the refreshing quality unique to natural forest water and its soft texture that blends gently with the skin. In a private, single-person tub, it gently yet firmly cools and tightens your body after sauna use.
Closed Days: None
1520-1 Hiromachi, Minamiashigara City, Kanagawa 250-0121
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 highly alkaline beauty spring and authentic sauna wrapped in the quiet of the forest and the murmur of the river
Kanagawa Minamiashigara City
"Modern Touji Only You" is a day-use hot spring facility nestled deep in the forests of Minamiashigara, Kanagawa Prefecture, built around the concept of harmony with nature. Its highly alkaline simple spring water, with a pH of 9.5, gushes from 200 m underground and is known as a beauty bath for its silky, smooth feel on the skin. Following a renovation in 2024, the sauna area now features Vihta Sauna, equipped with auto löyly, and Ruska Sauna, which offers self-löyly with a view of the river. With a cold plunge bath using luxurious Hakone groundwater and an outdoor bathing area where you can feel the forest air and the murmur of the river with your whole body, you can deeply soothe both body and mind in an immersive setting you could never experience in the city.
TypeNatural Hot Spring
A sodium chloride and sodium bicarbonate spring with a very high alkalinity of pH 9.5. It is cherished as a beauty bath that helps remove dead skin cells and leaves the skin smooth. With two temperature settings, 38°C and 41°C, you can enjoy a long soak while gazing out at the forest scenery, slowly releasing both physical and mental tension.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A sauna room filled with the scent of vihta. The powerful heat stimulates the entire body and encourages deep sweating. The compact room retains heat well, creating a strong setup that sauna enthusiasts will appreciate. Along with the soothing aroma of vihta, you can enjoy an authentic Finnish-style experience.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity5people
A meditation sauna newly installed in the men's open-air area, where self-löyly is possible. From the sauna room window, you can watch the flow of the Kasumigawa River and enjoy a sense of unity with nature. By adjusting the humidity at your own pace, you can spend a quiet, meditative time facing yourself, making this a luxurious space unique to Only You.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity1people
A cold plunge bath that makes lavish use of Kinran Water, drawn from 200 m underground in the Hakone water system. It is characterized by the refreshing quality unique to natural forest water and its soft texture that blends gently with the skin. In a private, single-person tub, it gently yet firmly cools and tightens your body after sauna use.
Closed Days: None
1520-1 Hiromachi, Minamiashigara City, Kanagawa 250-0121
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