Central Tennen Onsen Yu no Hana
Kamisu, Ibaraki, Japan
- Location
- Kamisu, Ibaraki, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Central Tennen Onsen Yu no Hana, in Kamisu, Ibaraki Prefecture, offers sodium-chloride thermal water at 41°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Kamisu faces the open Pacific on the Kashima-nada coast of Ibaraki, home to the great Kashima Jingu shrine — one of Japan's most important Shinto sanctuaries, dedicated to Takemikazuchi, the god of thunder and martial arts, deep in an ancient cryptomeria cedar grove. Yu no Hana (Flower of the Hot Water, referring to the beautiful mineral crusts that form at spring vents) draws artesian black water from the Kashima coastal aquifer. Visit the shrine's forest paths before the soak — the contrast of sacred cedar silence and thermal warmth is perfect.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.