Aso-shi Ritsu; Ichinomiya Onsen Center
Aso, Kumamoto, Japan
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- Location
- Aso, Kumamoto, Japan
- Water type
- thermal, 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
Aso-shi Ritsu Ichinomiya Onsen Center is located in Aso, Kumamoto Prefecture. Sodium-chloride thermal water reaches around 41°C, with an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Ichinomiya Onsen Center' — the municipal spa of Aso city's Ichinomiya district, home of the ancient Aso Shrine (阿蘇神社). The Aso Shrine is one of Japan's oldest and most powerful shrines, associated with the volcanic deity Takeiwatatsu-no-mikoto and predating written Japanese history. The shrine's楼門 gate (romon, two-storied gate) was destroyed by the 2016 Kumamoto earthquakes and has since been painstakingly restored. Bathing in the communal onsen of this sacred volcanic community is participation in 2,000 years of living tradition.
Nearby
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Tomarigi Onsen Aoi Aso
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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 thermal & sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.