Atami Ajiro Onsen
Ajiro, Atami, Shizuoka, Japan
- Location
- Ajiro, Atami, Shizuoka, Japan
- Water type
- sodium chloride
- Temperature
- 42 °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
Ajiro is a small coastal town located in Izu, the southern part of Atami, Shizuoka Prefecture, Japan. It was initially established as "Ajiro Village" in 1889 when the municipal system was enacted during the Meiji era. The town has its own fishing port and onsen.
Insider tip — Atami Ajiro Onsen occupies a hidden cove on the Izu Peninsula where sodium-chloride springs have been renowned since the Edo period. The thermal water emerges at high mineral concentration, imparting a silky heat that soaks deep into muscles. Rocky coastal paths link Ajiro to neighboring fishing hamlets, making for a scenic pre-bath walk. The sea-facing rotenburo here offers some of the finest Pacific views on the Izu coast.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 42 °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).