Tennen Onsen; Sechigo no Yu
Kaizuka, Osaka, Japan
- Location
- Kaizuka, Osaka, Japan
- Water type
- sodium chloride
- 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
Sechigo no Yu, in Kaizuka (Osaka prefecture), heats natural sodium-chloride water to 41°C. An indoor bath, an outdoor rotenburo bath, and a sauna make up this onsen near the Osaka coastline.
Insider tip — Sechigo no Yu serves Kaizuka City on the Izumi coast of Osaka Prefecture facing the Osaka Bay shoreline where the Kinki region longest beach stretches along the bay toward Kansai International Airport. Kaizuka City is famous for the Kaizuka Shell Mound — a vast Jomon-period shell midden documenting 4,000 years of shellfish harvesting and maritime culture along this Osaka Bay shoreline — one of the most important prehistoric archaeological sites in the Kinki region and a reminder that this urban coastal community has been continuously inhabited since the dawn of Japanese civilization.
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 water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.