Tsubusa Onsen; Tsubusa Rojin Ikoi no Ie
Oita Area, Oita, Japan
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- Location
- Oita Area, Oita, Japan
- Water type
- iron-rich
- Temperature
- 41 °C
- pH
- 6.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Tsubusa Onsen, hosted at the Tsubusa Rojin Ikoi no Ie center, is located in the Oita area. The iron-rich water emerges at 41°C, with a slightly acidic pH of 6.3. An indoor bath, an outdoor rotenburo bath and a sauna are available on site.
Insider tip — Tsubusa Onsen, attached to a senior community rest house, draws a classic iron-rich spring from the deep Oita volcanic sediments, producing warm amber water prized for joint and muscle relief. The facility caters primarily to local retirees, giving it a deeply unhurried pace uncommon in busier tourist onsens. Iron minerals here are absorbed transdermally and are thought to aid anemia recovery. Visitors under 60 are welcome and often find the quiet atmosphere a welcome contrast to flashier resort baths.
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 iron-rich water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).