Yasuragi no Sato Yamakuni Gensen
Analysis VerifiedOnce beloved by the local community as "Morizane Onsen," this spring was reborn in 2003 as "Yasuragi no Sato Yamakuni." Gushing from 1,000 meters underground at the foot of Mt. Hiko in Yamakuni, the Yasuragi no Sato Yamakuni Gensen is a gentle simple spring nurtured by the rich nature of Oku-Yabakei. Its mildly alkaline water, with a pH of 7.9, is exceptionally soft on the skin and minimally irritating, making it suitable for everyone from children to the elderly.
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 rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").
Absorbed through the skin to gently promote peripheral circulation.
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.
The spring temperature is a cool 31.8°C, so the baths are heated. As a gentle, mildly alkaline simple spring, a long, leisurely soak is recommended. It's rich in metasilicic acid, which moisturizes the skin, so gently pat yourself dry after bathing rather than rubbing vigorously.
The mildly alkaline water, with a pH of 7.9, gently removes dead skin cells, while a rich 166.0 mg/kg of metasilicic acid supports skin metabolism, promising a "silky skin" feel post-bath. This gentle spring quality guides the mind and body into "deep relaxation," making it ideal for those seeking to relieve daily fatigue.
Please be aware of the general contraindications common to all hot springs. Avoid bathing during active phases of illness or if you are unwell. While the spring is gentle, be mindful of the strain from prolonged bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yasuragi no Sato Yamakuni Gensen
- Spring type
- Simple Hot Spring
- Old spring type name
- 単純温泉
- Source temperature
- 31.8℃
- pH
- 8
- Flow type
- 掘削自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-01-14
- Analyst organization
- 公益社団法人大分県薬剤師会
- Registration No.
- 大分県第3号
Cations
- Sodium ion Na⁺
- 29.7 mg/kg
- Potassium ion K⁺
- 10.6 mg/kg
- Magnesium ion Mg²⁺
- 4.2 mg/kg
- Calcium ion Ca²⁺
- 14.2 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.06 mg/kg
Anions
- Fluoride ion F⁻
- 0.10 mg/kg
- Chloride ion Cl⁻
- 9.4 mg/kg
- Sulfate ion SO₄²⁻
- 1.2 mg/kg
- Bicarbonate ion HCO₃⁻
- 138 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.20 mg/kg
- Total anions
- 0.15 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
- 166 mg/kg
- Metaboric acid HBO₂
- 0.00 mg/kg
- Total undissociated
- 0.17 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 16.7 mg/kg
- Total dissolved gas
- 0.02 mg/kg
Trace Components
- Radon Rn
- 8.9 Bq/kg
Totals
- Total dissolved substances
- 0.37 mg/kg
- Component total
- 0.39 mg/kg
- Evaporation residue
- 0.23 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression, Chronic pain or stiffness in muscles and joints (chronic phase of rheumatoid arthritis, osteoarthritis, low back pain, neuralgia, frozen shoulder, bruises, sprains, etc.), muscle stiffness due to motor paralysis, poor circulation, peripheral circulatory failure, gastrointestinal dysfunction (stomach heaviness, intestinal gas, etc.), high blood pressure (mild), impaired glucose tolerance (diabetes), dyslipidemia (mild), mild asthma or emphysema, hemorrhoid pain, autonomic instability, stress-related symptoms (insomnia, depression, etc.), post-illness recovery, fatigue recovery, health promotion
- 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), Active phases of illness (especially with fever), active tuberculosis, advanced malignant tumors or severe anemia with significant physical decline, severe heart or lung disease causing shortness of breath with slight movement, severe kidney disease with swelling, gastrointestinal bleeding, visible bleeding, acute exacerbation of chronic illness
Drinking
- Drinkability
- Not drinkable
