Enjoy exceptional free-flowing groundwater and two saunas for a refined adult retreat
Kanagawa Atsugi City
"Urban Spa" is a refined relaxation facility for adults, directly operated by Atsugi Urban Hotel in Atsugi, Kanagawa Prefecture. Its biggest highlight is the cold plunge bath, which uses mineral-rich natural groundwater in generous free-flowing circulation. The weakly alkaline, medium-hard water has a smooth texture that feels gentle on the skin, turning the post-sauna cooldown into an exquisite experience. The sauna area features two types of saunas: a high-temperature dry sauna with powerful heat and a steam sauna that lets you work up a thoroughly satisfying sweat. Despite its convenient location near the station, the space is quiet and calm, making it an urban hideaway where you can deeply reset both body and mind after work or in between your daily routines.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity15people
An authentic dry sauna where you can really feel the heat. Stable heat from a convection stove fills the room and efficiently promotes deep sweating. In a space wrapped in calm lighting and silence, this is Urban Spa's main sauna, where you can enjoy a luxurious sauna session while reflecting on yourself.
Sauna TypeSteam Sauna
Capacity6people
A gentle steam sauna that lets you work up a generous sweat in comfort. Soft steam moisturizes the skin and helps activate the pores and sweat glands. Wrapped in a moist heat that differs from the dry sauna, it slowly releases tension in both body and mind, creating a soothing space where you can feel the detox effect.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
Generous free-flowing use of mineral-rich natural groundwater. Its greatest feature is the smooth, skin-adhering quality of its weakly alkaline, medium-hard water. The superb cooldown experience is crisp and cold, yet pleasantly gentle, making it so comfortable you'll be hooked after just one soak. This carefully crafted facility lets you experience the quality of the water with your whole body.
Closed Days: Monday
B1F, Atsugi Urban Plaza Atsugi, 3-3-9 Nakacho, Atsugi-shi, Kanagawa 243-0018
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
Enjoy exceptional free-flowing groundwater and two saunas for a refined adult retreat
Kanagawa Atsugi City
"Urban Spa" is a refined relaxation facility for adults, directly operated by Atsugi Urban Hotel in Atsugi, Kanagawa Prefecture. Its biggest highlight is the cold plunge bath, which uses mineral-rich natural groundwater in generous free-flowing circulation. The weakly alkaline, medium-hard water has a smooth texture that feels gentle on the skin, turning the post-sauna cooldown into an exquisite experience. The sauna area features two types of saunas: a high-temperature dry sauna with powerful heat and a steam sauna that lets you work up a thoroughly satisfying sweat. Despite its convenient location near the station, the space is quiet and calm, making it an urban hideaway where you can deeply reset both body and mind after work or in between your daily routines.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity15people
An authentic dry sauna where you can really feel the heat. Stable heat from a convection stove fills the room and efficiently promotes deep sweating. In a space wrapped in calm lighting and silence, this is Urban Spa's main sauna, where you can enjoy a luxurious sauna session while reflecting on yourself.
Sauna TypeSteam Sauna
Capacity6people
A gentle steam sauna that lets you work up a generous sweat in comfort. Soft steam moisturizes the skin and helps activate the pores and sweat glands. Wrapped in a moist heat that differs from the dry sauna, it slowly releases tension in both body and mind, creating a soothing space where you can feel the detox effect.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity6people
Generous free-flowing use of mineral-rich natural groundwater. Its greatest feature is the smooth, skin-adhering quality of its weakly alkaline, medium-hard water. The superb cooldown experience is crisp and cold, yet pleasantly gentle, making it so comfortable you'll be hooked after just one soak. This carefully crafted facility lets you experience the quality of the water with your whole body.
Closed Days: Monday
B1F, Atsugi Urban Plaza Atsugi, 3-3-9 Nakacho, Atsugi-shi, Kanagawa 243-0018
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