A famous free-flowing natural spring and the shock of waves of heat pouring down from the ceiling
Ibaraki Tsukuba City
"Tsukuba Onsen Kirari Bettei" is a day-use hot spring facility in Tsukuba, Ibaraki Prefecture. The sodium chloride spring that gushes up from 1620m underground can be enjoyed in the open-air baths as luxurious free-flowing natural spring water. In the sauna room, the facility’s unique automatic löyly, which blasts hot air from the ceiling, is popular, and the upper benches let you feel an intense wave of heat. The cool cold water bath, using groundwater, has a deep basin that thoroughly cools your whole body. Its calm Japanese-style design and well-appointed outdoor rest area create a high-quality healing space for adults.
TypeNatural Hot Spring
A sodium chloride spring that gushes up from 1620m underground. In the open-air bath "Ue no Yu," you can enjoy it as free-flowing natural spring water with only heating applied. It helps smooth and condition the skin, allowing you to fully enjoy this famous hot spring while feeling the abundant natural surroundings.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A sauna equipped with a distinctive automatic löyly function that blasts hot air from the ceiling. The periodically activated wave of heat instantly warms the room and delivers an intense sweating experience. Sit on the upper bench and you can feel an even more powerful surge of heat, making this a space that even sauna enthusiasts will appreciate.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity3people
A deep cold water bath that makes generous use of groundwater. Its defining features are a crisp coldness and the soft feel unique to groundwater. Because it is quite deep, it cools the entire body efficiently and serves as a refreshing step leading into the outdoor air bath afterward.
Closed Days: None
305-0831 614-1 Nishi-Ohashi, Tsukuba, Ibaraki 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
A famous free-flowing natural spring and the shock of waves of heat pouring down from the ceiling
Ibaraki Tsukuba City
"Tsukuba Onsen Kirari Bettei" is a day-use hot spring facility in Tsukuba, Ibaraki Prefecture. The sodium chloride spring that gushes up from 1620m underground can be enjoyed in the open-air baths as luxurious free-flowing natural spring water. In the sauna room, the facility’s unique automatic löyly, which blasts hot air from the ceiling, is popular, and the upper benches let you feel an intense wave of heat. The cool cold water bath, using groundwater, has a deep basin that thoroughly cools your whole body. Its calm Japanese-style design and well-appointed outdoor rest area create a high-quality healing space for adults.
TypeNatural Hot Spring
A sodium chloride spring that gushes up from 1620m underground. In the open-air bath "Ue no Yu," you can enjoy it as free-flowing natural spring water with only heating applied. It helps smooth and condition the skin, allowing you to fully enjoy this famous hot spring while feeling the abundant natural surroundings.
Sauna TypeDry Sauna
Stove TypeConvection Stove (Sauna Stone)
Capacity20people
A sauna equipped with a distinctive automatic löyly function that blasts hot air from the ceiling. The periodically activated wave of heat instantly warms the room and delivers an intense sweating experience. Sit on the upper bench and you can feel an even more powerful surge of heat, making this a space that even sauna enthusiasts will appreciate.
Water QualityNatural Water (Groundwater, Spring, etc.)
Capacity3people
A deep cold water bath that makes generous use of groundwater. Its defining features are a crisp coldness and the soft feel unique to groundwater. Because it is quite deep, it cools the entire body efficiently and serves as a refreshing step leading into the outdoor air bath afterward.
Closed Days: None
305-0831 614-1 Nishi-Ohashi, Tsukuba, Ibaraki 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