Date Onsen Well No. 2
Analysis UnverifiedThe spring began in 1975, when a local farmer bored for hot water to warm his greenhouses and his own bath. Redrilled in 1999 to about 1,520 m, Well No. 2 now yields 73.6°C water: nearly colorless and clear, yet unmistakably salty, a dense sodium- and calcium-bearing chloride spring with a plain, sturdy character.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Undissociated boric acid with antibacterial action that keeps the skin surface clean.
Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").
Salt forms a thin film on the skin, retaining heat after bathing. Helps with poor 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 source is 73.6°C and pools differ in temperature, so start in a milder bath before moving to a hotter one. Rinse only lightly afterward; the salty film helps the warmth last.
With 6,156 mg/kg of chloride, the salt is thought to coat the skin and slow heat loss, giving a restorative warmth that lingers long after bathing and eases you into deep relaxation on cold days.
The source is very hot and some pools run hot, so avoid long soaks. Being hypertonic and salty, it may sting cuts or sensitive skin.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Date Onsen Well No. 2
- Spring type
- Sodium Chloride Hot Spring
- Old spring type name
- 食塩泉
- Source temperature
- 73.6℃
- pH
- 7.7
- Flow rate
- 240 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 高張性
Analysis Document
- Analysis date
- 2009-11-22
- Analyst organization
- 株式会社環境総合科学
Cations
- Sodium ion Na⁺
- 3492 mg/kg
- Potassium ion K⁺
- 46.1 mg/kg
- Ammonium ion NH₄⁺
- 1.1 mg/kg
- Magnesium ion Mg²⁺
- 1.1 mg/kg
- Calcium ion Ca²⁺
- 662 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.20 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Zinc ion Zn²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- 0.01 mg/kg
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 4.2 mg/kg
Anions
- Fluoride ion F⁻
- 1.2 mg/kg
- Chloride ion Cl⁻
- 6156 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 602 mg/kg
- Bicarbonate ion HCO₃⁻
- 42.7 mg/kg
- Carbonate ion CO₃²⁻
- 0.20 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.10 mg/kg
- Total anions
- 6.8 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.30 mg/kg
- Metasilicic acid H₂SiO₃
- 88.5 mg/kg
- Metaboric acid HBO₂
- 65.2 mg/kg
- Total undissociated
- 0.15 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 13.2 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Total dissolved substances
- 11.2 mg/kg
- Component total
- 11.2 mg/kg
- Evaporation residue
- 11.1 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Autonomic instability, Insomnia, 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
