Amakusa-shi Ushibuka Onsen Center Yasuragi no Yu

Ushibuka, Kumamoto, Japan

Location: Ushibuka, Kumamoto, 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

Amakusa-shi Ushibuka Onsen Center Yasuragi no Yu, in Ushibuka, Kumamoto, on the Amakusa islands, offers sodium-chloride water at 41°C, with an indoor bath, an outdoor rotenburo and a sauna.

Insider tip — Amakusa-shi Ushibuka Onsen Center Yasuragi no Yu serves the fishing community of Ushibuka on the southern tip of the Amakusa Islands in Kumamoto Prefecture. The sodium-chloride thermal waters reflect the maritime volcanic geology of this island archipelago in the East China Sea. Post-soak relaxation areas look out across the channel toward the Yatsushiro Sea, where local boats return with their daily haul. The facility is a cherished social hub for island residents, and visitors are warmly welcomed into the communal bathing ritual.

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