Kaji Onsen
Hakodate, Hokkaido, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Hakodate, Hokkaido, 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
Kaji Onsen is located in Hakodate, on the island of Hokkaido, Japan. Its sodium-chloride thermal water emerges at 41°C, filling indoor baths and an outdoor rotenburo, complemented by a sauna for a typically Japanese relaxation experience.
Insider tip — Hakodate is Hokkaido's most historically layered city — Japan's first international treaty port (1854, Perry Treaty), its star-shaped Goryokaku fort (1866, last battle of the Meiji Restoration), and one of Japan's top three night views from Mt. Hakodate. The Hakodate morning fish market (朝市) is one of Japan's finest: sea urchin, squid, and crab from Tsugaru Strait are legendary. Kaji Onsen provides a local soak in this port city where Russian Orthodox churches and Victorian consulate buildings share streets with ramen shops.
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.