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U no Hama Onsen

Kashiwazaki, Niigata, Japan
U no Hama Onsen
Location
Kashiwazaki, Niigata, Japan
Water type
sodium chloride
Temperature
41 °C
pH
7.3

Water profile

Thermicity
Sedative
41 °C
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

U no Hama Onsen—Cormorant Beach Spring—takes its name from the u (cormorant), the diving water bird whose mastery of underwater pursuit has made it the star of ukai (cormorant fishing)—one of Japan's most ancient and aesthetically distinctive traditional fishing methods, practiced on rivers across Japan where trained cormorants dive for sweetfish (ayu) while restrained by a string held by the master fisherman in a torchlit summer-evening spectacle of extraordinary traditional beauty. The cormorant beach setting suggests a spring located at the coastal or riverside margin where cormorants hunt—a spring that shares its setting with the skilled diving bird whose mastery of the water element mirrors the thermal spring bather's complete immersion in the mineral waters. This spring's cormorant beach name connects thermal bathing to the Japanese tradition of appreciating the skill and beauty of water-mastery in both the diving bird and the thermal spring culture.

Insider tip — U no Hama Onsen is a coastal hot spring resort in Niigata Prefecture facing the Sea of Japan. The sodium-chloride waters have a warming, salt-rich character typical of Japan's western seaboard springs, helping bathers withstand the region's heavy winter snows. Fresh seafood from the Sea of Japan complements the bathing experience at local ryokan.
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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 water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).