Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Tennen Onsen Resort Bijin no Yu (Carnival Hills) is located in Toride, Ibaraki Prefecture. The sodium-chloride water reaches 41°C, pH 7.3. An indoor bath, an outdoor rotenburo bath and a sauna complete the offering.
Insider tip — Tennen Onsen Resort Bijin no Yu at Carnival Hills draws sodium-chloride spring water in Toride, a commuter city between Tokyo and Tsukuba that has embraced its thermal spring as a local leisure anchor. The name 'bijin no yu', meaning water of beautiful people, alludes to the skin-smoothing properties attributed to the mineral-rich brine. The resort setting includes a variety of indoor and outdoor baths, with the evening illumination of the outdoor area creating an especially romantic atmosphere. Easily accessible by train from Ueno Station, it is a popular weekend escape for Tokyo residents seeking urban-adjacent onsen comfort.