Immerse yourself in a 100% natural free-flowing spring with an intense sulfur aroma, and an underground-water cold plunge bath
Toyama Uozu City
"Kintarou Onsen Karuna no Yakata" is a hot spring facility in Uozu City, Toyama Prefecture, boasting one of the highest sulfur concentrations in Japan. Its milky-white sulfur- and sodium/calcium-chloride spring is offered as 100% natural free-flowing source water with no added water or heating, and it warms you all the way through with a strong sulfur aroma. The sauna is equipped with a dry sauna. Its greatest attraction is the free-flowing cold plunge bath using underground water, where clear natural water gently yet intensely cools the body after sauna use. You can enjoy a one-of-a-kind bathing experience in a grand public bath with massive natural stones arranged throughout.
TypeNatural Hot Spring
An ultra-rich natural hot spring of sulfur- and sodium/calcium-chloride water. It is 100% natural free-flowing source water with absolutely no added water or heating, and the milky-white water and strong sulfur smell are proof of a genuine hot spring. It is excellent for retaining warmth, beautifying the skin, and calming the body, and is counted among the notable hot springs representing the Hokuriku region.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity18people
An authentic dry sauna heated by a far-infrared gas stove. You can sweat it out slowly at your own pace depending on how you feel. In the spacious room, you can watch TV while experiencing deep sweating from the synergistic effect with the hot spring.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity5people
Luxuriously using cool natural water pumped up from underground as a free-flowing bath. The water is remarkably soft, and its defining feature is a refreshing sensation that seems to envelop the skin. Fresh water constantly overflows, drinkable as well, and cools the body down sharply after sauna use.
Closed Days: None
〒937-0013 6000 Tenjinnoshin, Uozu City, Toyama 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
Immerse yourself in a 100% natural free-flowing spring with an intense sulfur aroma, and an underground-water cold plunge bath
Toyama Uozu City
"Kintarou Onsen Karuna no Yakata" is a hot spring facility in Uozu City, Toyama Prefecture, boasting one of the highest sulfur concentrations in Japan. Its milky-white sulfur- and sodium/calcium-chloride spring is offered as 100% natural free-flowing source water with no added water or heating, and it warms you all the way through with a strong sulfur aroma. The sauna is equipped with a dry sauna. Its greatest attraction is the free-flowing cold plunge bath using underground water, where clear natural water gently yet intensely cools the body after sauna use. You can enjoy a one-of-a-kind bathing experience in a grand public bath with massive natural stones arranged throughout.
TypeNatural Hot Spring
An ultra-rich natural hot spring of sulfur- and sodium/calcium-chloride water. It is 100% natural free-flowing source water with absolutely no added water or heating, and the milky-white water and strong sulfur smell are proof of a genuine hot spring. It is excellent for retaining warmth, beautifying the skin, and calming the body, and is counted among the notable hot springs representing the Hokuriku region.
Sauna TypeDry Sauna
Stove TypeInfrared Heater
Capacity18people
An authentic dry sauna heated by a far-infrared gas stove. You can sweat it out slowly at your own pace depending on how you feel. In the spacious room, you can watch TV while experiencing deep sweating from the synergistic effect with the hot spring.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity5people
Luxuriously using cool natural water pumped up from underground as a free-flowing bath. The water is remarkably soft, and its defining feature is a refreshing sensation that seems to envelop the skin. Fresh water constantly overflows, drinkable as well, and cools the body down sharply after sauna use.
Closed Days: None
〒937-0013 6000 Tenjinnoshin, Uozu City, Toyama 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