Mitsuishi Konbu Onsen
Mitsuishi, Hokkaido Prefecture, Japan
- Location
- Mitsuishi, Hokkaido Prefecture, 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
Mitsuishi Konbu Onsen is located in Mitsuishi, Hokkaido Prefecture, a coastal area known for its kelp harvest. Its sodium-chloride water reaches around 41 °C (106 °F). An indoor bath, a rotenburo-style outdoor bath and a sauna round out the facility.
Insider tip — Mitsuishi Konbu Onsen in Hidaka, Hokkaido, is named for the giant kelp (konbu) harvested along this Pacific coastline, and the spring's mineral-rich sodium-chloride water is said to share the sea's nourishing properties. The Hidaka region is famous for Thoroughbred horse ranching on Hokkaido's gentle rolling plains, giving the landscape an unexpected pastoral character. This small, community-run onsen caters primarily to local fishermen and ranchers seeking post-labor relaxation in genuinely unfiltered spring water. The absence of tourist infrastructure ensures an immersive, local Japanese bathing experience.
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 (idéal automne-hiver).