A renowned beauty bath hidden deep in Nibukawa Gorge, this serene retreat is wrapped in peace and quiet
Ehime Imabari City
A quiet hot spring inn tucked away at the deepest point of Nibukawa Gorge, surrounded by the sound of a murmuring stream. Nibukawa Onsen, counted as one of Iyo's Three Great Baths, is a radon-containing simple spring with a high alkalinity of pH 9.9, and is known as a beauty bath that leaves the skin feeling smooth. The large public bath has big windows overlooking the gorge, allowing guests to enjoy the silky waters while taking in the seasonal scenery. A full-fledged sauna with self-löyly and a cold plunge bath using fresh spring water in continuous flow have also been newly added, offering an exceptional refreshment experience amid magnificent nature.
TypeNatural Hot Spring
Nibukawa Onsen, a famous hot spring counted as one of Iyo's Three Great Baths. Boasting a high alkalinity of pH 9.9, its radon-containing waters have a silky feel and are renowned as a beauty bath. From the large windows of the public bath, you can admire the ever-changing seasonal face of Nibukawa Gorge, and enjoy a luxurious time soaking in the smooth waters while listening to the sound of the stream.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A newly installed authentic sauna surrounded by the nature of Nibukawa. Self-löyly is available, and as steam rises, the scent of wood fills the room, leading you into deep relaxation. From the window, you can look out over the greenery of the gorge and enjoy a pleasant sweat while feeling one with nature. It is a space where you can savor your own luxurious time in silence.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity1people
A cold plunge bath that uses Nibukawa's abundant underground water in continuous flow. The water quality is amazingly soft, with a mellow texture that seems to cling gently to the skin. Fresh water constantly flows in, delivering outstanding coolness. It gently, yet thoroughly, cools down a body heated by the sauna. A blissful moment in which you can feel the blessings of nature on your skin.
Closed Days: Open all year
794-0121 Ehime Prefecture Imabari City Tamagawa-cho Nibukawa Ko 283
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 moreA renowned beauty bath hidden deep in Nibukawa Gorge, this serene retreat is wrapped in peace and quiet
Ehime Imabari City
A quiet hot spring inn tucked away at the deepest point of Nibukawa Gorge, surrounded by the sound of a murmuring stream. Nibukawa Onsen, counted as one of Iyo's Three Great Baths, is a radon-containing simple spring with a high alkalinity of pH 9.9, and is known as a beauty bath that leaves the skin feeling smooth. The large public bath has big windows overlooking the gorge, allowing guests to enjoy the silky waters while taking in the seasonal scenery. A full-fledged sauna with self-löyly and a cold plunge bath using fresh spring water in continuous flow have also been newly added, offering an exceptional refreshment experience amid magnificent nature.
TypeNatural Hot Spring
Nibukawa Onsen, a famous hot spring counted as one of Iyo's Three Great Baths. Boasting a high alkalinity of pH 9.9, its radon-containing waters have a silky feel and are renowned as a beauty bath. From the large windows of the public bath, you can admire the ever-changing seasonal face of Nibukawa Gorge, and enjoy a luxurious time soaking in the smooth waters while listening to the sound of the stream.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity6people
A newly installed authentic sauna surrounded by the nature of Nibukawa. Self-löyly is available, and as steam rises, the scent of wood fills the room, leading you into deep relaxation. From the window, you can look out over the greenery of the gorge and enjoy a pleasant sweat while feeling one with nature. It is a space where you can savor your own luxurious time in silence.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity1people
A cold plunge bath that uses Nibukawa's abundant underground water in continuous flow. The water quality is amazingly soft, with a mellow texture that seems to cling gently to the skin. Fresh water constantly flows in, delivering outstanding coolness. It gently, yet thoroughly, cools down a body heated by the sauna. A blissful moment in which you can feel the blessings of nature on your skin.
Closed Days: Open all year
794-0121 Ehime Prefecture Imabari City Tamagawa-cho Nibukawa Ko 283
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