Oyado Yuraku Gensen
Analysis VerifiedThe Oyado Yuraku Gensen is a private source bubbling up in the central area of Yufuin Onsen, a town known for its idyllic rural landscapes at the foot of Mt. Yufu. Many of Yufuin's springs, a long-cherished health resort area, are classified as simple hot springs gentle on the skin. This source is one of them, characterized by its mild and soft touch. Immersing yourself in its waters feels like being embraced by the serene nature of Yufuin, offering a peaceful respite for resetting mind and body away from daily life.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
- Metasilicic acid226 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature49.4℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
Scores are calculated from mineral analysis data based on the Mineral Spring Analysis Guidelines (Ministry of Environment, Japan). They are unrelated to facility atmosphere or service quality.
▸Note
The temperature, pH and component values shown here are based on the hot spring analysis (source). Actual values in the bath may differ depending on heating, dilution, recycling and filtration. Please check current usage status at the facility.
With a slightly high temperature of 49.4°C, avoid long soaks and try "split bathing"—taking breaks when you start to sweat. As a mild, slightly alkaline spring, it's best not to rinse off afterward. Allowing the minerals to remain on your skin will enhance their beneficial effects.
With a pH of 8.3, this slightly alkaline water gently removes old skin cells, which may lead to silky skin. Furthermore, it is rich in metasilicic acid (226.0 mg/kg), a moisturizing component that leaves the skin feeling hydrated. This mild simple spring offers a form of balneotherapy perfect for deep relaxation, ideal for those seeking to relieve daily fatigue.
While the spring quality is mild and gentle, the temperature is somewhat high. Adjust your bathing time according to your condition and be careful not to overheat. Remember to stay hydrated before and after your bath.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Oyado Yuraku Gensen
- Spring type
- Simple Hot Spring
- Old spring type name
- 単純温泉
- Source temperature
- 49.4℃
- pH
- 8.3
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2024-10-10
- Analyst organization
- 公益社団法人大分県薬剤師会
- Registration No.
- 大分県第3号
Cations
- Lithium ion Li⁺
- 0.20 mg/kg
- Sodium ion Na⁺
- 102 mg/kg
- Potassium ion K⁺
- 26.3 mg/kg
- Magnesium ion Mg²⁺
- 7.9 mg/kg
- Calcium ion Ca²⁺
- 11.4 mg/kg
- Aluminum ion Al³⁺
- 0.10 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.05 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 148 mg/kg
Anions
- Fluoride ion F⁻
- 0.10 mg/kg
- Chloride ion Cl⁻
- 79.1 mg/kg
- Sulfate ion SO₄²⁻
- 50.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 171 mg/kg
- Carbonate ion CO₃²⁻
- 12.0 mg/kg
- Bromide ion Br⁻
- 0.20 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.40 mg/kg
- Total anions
- 313 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 226 mg/kg
- Metaboric acid HBO₂
- 4.2 mg/kg
- Total undissociated
- 230 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- < 0.1 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Trace Components
- Radon Rn
- < 7.4 Bq/kg
Totals
- Total dissolved substances
- 691 mg/kg
- Component total
- 691 mg/kg
- Evaporation residue
- 552 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Chronic pain or stiffness in muscles and joints, Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction
- Contraindications
- Acute illness (especially with fever), Active tuberculosis, Malignant tumors, Severe heart disease, Respiratory failure, Renal failure, Bleeding disorders, Severe anemia, Any actively progressing illness, Pregnancy (especially early and late stages)
Drinking
- Drinkability
- Not drinkable
