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Iwate-machi Rojin Fukushi Center; Kuroishi Onsen; Tamabukiso

Iwate, Iwate, Japan
Iwate-machi Rojin Fukushi Center; Kuroishi Onsen; Tamabukiso
Location
Iwate, Iwate, Japan
Water type
sodium chloride
Temperature
42 °C
pH
7.3

Water profile

Thermicity
Sedative
42 °C
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

In a traditional Japanese onsen, guests immerse themselves in a communal bathing ritual, fostering relaxation and social connection. The bathing tradition emphasizes cleanliness, modesty, and respect for others. Before bathing, visitors typically wash themselves thoroughly in a designated area, often with soap and water. They then enter the bathing area, where they soak in the warm waters, often in a serene and peaceful environment. This communal experience promotes a sense of community and tranquility.

Insider tip — Tamabukiso, the jewel fountain lodge, serves Iwate-machi at the southern fringe of the Hachimantai volcanic zone where the Goshono Jomon site — a 5,000-year-old village with large circular pit dwellings — documents extraordinary cultural sophistication among prehistoric Iwate communities. The Black Stone spring draws from the sedimentary aquifer of the northern Kitakami basin in a town that has been both a farming and a pilgrimage transit community since antiquity.
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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.