Hatsushiba Onsen
Sakai, Osaka, Japan
- Location
- Sakai, Osaka, 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
Hatsushiba Onsen is set in Sakai, Osaka Prefecture, a port city south of the metropolis. Sodium-chloride thermal water flows at 41°C here, with an indoor bath, an outdoor rotenburo, and a sauna.
Insider tip — Sakai contains Japan's largest keyhole-shaped burial mound — Daisen Kofun (possibly Emperor Nintoku's tomb, 486m long, UNESCO World Heritage 2019), so immense it can only be fully perceived from the air. Medieval Sakai was Japan's most powerful free trading city, rivaling Venice; Sen no Rikyu (who perfected chado, the tea ceremony) and the famous Sakai blade-smiths both emerged from this extraordinary city. Hatsushiba Onsen serves Sakai's historically dense shitamachi (old downtown) district.
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.