Unwind with free-flowing natural spring water and a cave bath filled with high-concentration carbonated spring water
Saitama Kuki City
"Natural Hot Spring Mori no Seseragi Nagomi" is a day-use hot spring facility in Kuki City, Saitama Prefecture, offering abundant free-flowing spring water. The sodium chloride spring rising from underground is known as an "healing hot spring" for its rich mineral content and ability to keep you warm long after bathing. The sauna area features two types of saunas: a powerful far-infrared high-temperature sauna and a salt sauna where you can warm up slowly and thoroughly. With alternating hot and cold bathing in the crisp-cold cold plunge bath, you can experience deep refreshment. From the signature "high-concentration carbonated cave bath" to the open-air bath surrounded by greenery, the facility offers a variety of thoughtfully designed baths, providing a blissful moment to relax both body and mind and escape the hustle and bustle of the city.
TypeNatural Hot Spring
The spring water rising from underground is offered as completely free-flowing natural water with no added water. The sodium chloride spring is extremely rich in minerals, with a salty taste reminiscent of seawater. It has excellent heat-retention effects, and the warmth lingers long after bathing, making it a "beauty bath".
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity15people
A serious three-tier dry sauna equipped with a far-infrared gas stove. Its powerful heat envelops your whole body and promotes deep sweating efficiently. You can enjoy a leisurely sauna session in a spacious setting while watching TV.
Sauna TypeSalt Sauna
Capacity10people
A medium-temperature salt sauna that lets you warm up gradually and comfortably. By rubbing the provided salt onto your body, you can help remove old dead skin cells and expect smooth, beautiful skin. Even if you are not fond of high-temperature saunas, this is a space where you can enjoy detoxing at your own pace.
Water QualityTap Water
Capacity4people
A cool cold plunge bath located right near the sauna. Its crisp, sharp coldness instantly tightens up your overheated body after the sauna and leads you into a refreshing cool-down. It is also deep enough to cool your entire body thoroughly.
Closed Days: None
〒346-0029 1574-1 Ezura, Kuki City, Saitama Prefecture
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
Unwind with free-flowing natural spring water and a cave bath filled with high-concentration carbonated spring water
Saitama Kuki City
"Natural Hot Spring Mori no Seseragi Nagomi" is a day-use hot spring facility in Kuki City, Saitama Prefecture, offering abundant free-flowing spring water. The sodium chloride spring rising from underground is known as an "healing hot spring" for its rich mineral content and ability to keep you warm long after bathing. The sauna area features two types of saunas: a powerful far-infrared high-temperature sauna and a salt sauna where you can warm up slowly and thoroughly. With alternating hot and cold bathing in the crisp-cold cold plunge bath, you can experience deep refreshment. From the signature "high-concentration carbonated cave bath" to the open-air bath surrounded by greenery, the facility offers a variety of thoughtfully designed baths, providing a blissful moment to relax both body and mind and escape the hustle and bustle of the city.
TypeNatural Hot Spring
The spring water rising from underground is offered as completely free-flowing natural water with no added water. The sodium chloride spring is extremely rich in minerals, with a salty taste reminiscent of seawater. It has excellent heat-retention effects, and the warmth lingers long after bathing, making it a "beauty bath".
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity15people
A serious three-tier dry sauna equipped with a far-infrared gas stove. Its powerful heat envelops your whole body and promotes deep sweating efficiently. You can enjoy a leisurely sauna session in a spacious setting while watching TV.
Sauna TypeSalt Sauna
Capacity10people
A medium-temperature salt sauna that lets you warm up gradually and comfortably. By rubbing the provided salt onto your body, you can help remove old dead skin cells and expect smooth, beautiful skin. Even if you are not fond of high-temperature saunas, this is a space where you can enjoy detoxing at your own pace.
Water QualityTap Water
Capacity4people
A cool cold plunge bath located right near the sauna. Its crisp, sharp coldness instantly tightens up your overheated body after the sauna and leads you into a refreshing cool-down. It is also deep enough to cool your entire body thoroughly.
Closed Days: None
〒346-0029 1574-1 Ezura, Kuki City, Saitama Prefecture
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