Yobizuru Onsen
Analysis UnverifiedRising in a district long known by the place name "Yuden", this spring was developed in 1952. It emerges at 20.7°C as a cold mineral spring whose defining trait is a trace of dissolved radon. With only 0.185 g/kg of dissolved solids, the water is light and unassuming, like a quiet companion for unhurried, restorative bathing.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A trace component with gentle antibacterial and anti-inflammatory action.
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 source is a 20.7°C cold spring, so check the bath temperature before entering. Radon is also taken in through breathing, so linger in the steamy bathroom. Weakly alkaline at pH 8.3, it is gentle on skin; short soaks with breaks suit it better than one long bath.
With 131.7×10⁻¹⁰ Ci/kg of radon on its analysis, this radioactive spring is traditionally associated with helping to relieve pain in stiff joints and muscles, and its gentle stimulus has long been linked with immune system stimulation.
The source is a 20.7°C cold spring. Avoid bathing when unwell or during acute illness, rest between soaks, and follow the facility's guidance for drinking.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yobizuru Onsen
- Spring type
- Simple Cold Mineral Spring
- Source temperature
- 20.7℃
- pH
- 8.3
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2024-12-25
- Analyst organization
- 公益財団法人山口県予防保健協会
- Registration No.
- 山口薬務第3号
Cations
- Lithium ion Li⁺
- 0.05 mg/kg
- Sodium ion Na⁺
- 23.7 mg/kg
- Potassium ion K⁺
- 2.0 mg/kg
- Ammonium ion NH₄⁺
- < 0.05 mg/kg
- Magnesium ion Mg²⁺
- 1.2 mg/kg
- Calcium ion Ca²⁺
- 20.1 mg/kg
- Aluminum ion Al³⁺
- < 0.01 mg/kg
- Manganese ion Mn²⁺
- < 0.01 mg/kg
- Zinc ion Zn²⁺
- < 0.005 mg/kg
- Lead ion Pb²⁺
- < 0.005 mg/kg
- Strontium ion Sr²⁺
- 0.10 mg/kg
- Barium ion Ba²⁺
- < 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.005 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 0.05 mg/kg
Anions
- Fluoride ion F⁻
- 2.9 mg/kg
- Chloride ion Cl⁻
- 11.6 mg/kg
- Hydrogen sulfide ion HS⁻
- < 0.1 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.05 mg/kg
- Sulfate ion SO₄²⁻
- 5.1 mg/kg
- Bicarbonate ion HCO₃⁻
- 90.5 mg/kg
- Carbonate ion CO₃²⁻
- < 0.5 mg/kg
- Bromide ion Br⁻
- < 0.05 mg/kg
- Iodide ion I⁻
- < 0.05 mg/kg
- Nitrite ion NO₂⁻
- < 0.05 mg/kg
- Nitrate ion NO₃⁻
- 0.06 mg/kg
- Hydrogen phosphate HPO₄²⁻
- < 0.01 mg/kg
- Total anions
- 0.11 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 27.1 mg/kg
- Metaboric acid HBO₂
- 0.70 mg/kg
- Total undissociated
- 0.03 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.80 mg/kg
- Free hydrogen sulfide H₂S
- < 0.1 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.18 mg/kg
- Component total
- 0.19 mg/kg
- Evaporation residue
- 0.14 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Hyperuricemia (gout), Rheumatoid arthritis, Ankylosing spondylitis
- General indications
- High blood pressure (mild), Autonomic instability, Insomnia, Depression, 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), Undergoing radiation therapy, pregnancy (radioactive springs)
Drinking
- Drinkability
- Not drinkable
