Sarugawa Onsen
Analysis UnverifiedSarugawa Onsen has long been known as a cold spring seeping naturally from the left bank of the Saru River in a national forest, with piping to the baths beginning in 1973. As the natural flow dwindled, an 80-meter well was drilled in 1997 and now feeds the baths. The pH 9.4 alkaline water carries a faint hint of sulfur and leaves skin feeling smooth, suiting skiers and campers who want to unwind in the Hidaka hills.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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 pH 9.4 alkaline water softens the skin's surface, so soak gently without scrubbing, and moisturize afterward if your skin tends to dry out.
Its pH 9.4 alkalinity and 2.9 mg/kg of hydrosulfide are traditionally associated with silky skin, and after a day of hiking or skiing the gentle water may support deep relaxation.
Because it contains sulfur, those with sensitive skin should avoid long soaks. People in acute illness or with serious heart conditions should refrain or consult a doctor.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Sarugawa Onsen
- Spring type
- Simple Sulfur Cold Mineral Spring
- Old spring type name
- 単純硫黄泉
- Source temperature
- 10.4℃
- pH
- 9.4
- Flow rate
- 50 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2008-09-05
- Analyst organization
- 株式会社環境総合科学
- Registration No.
- 北海道第4号
Cations
- Sodium ion Na⁺
- 220 mg/kg
- Potassium ion K⁺
- 0.70 mg/kg
- Ammonium ion NH₄⁺
- 0.10 mg/kg
- Magnesium ion Mg²⁺
- 0.10 mg/kg
- Calcium ion Ca²⁺
- 1.5 mg/kg
- Aluminum ion Al³⁺
- 0.40 mg/kg
- Manganese ion Mn²⁺
- 0.06 mg/kg
- Iron(II) ion Fe²⁺
- 0.05 mg/kg
- Zinc ion Zn²⁺
- 0.03 mg/kg
- Copper ion Cu²⁺
- not detected
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 0.22 mg/kg
Anions
- Fluoride ion F⁻
- 3.5 mg/kg
- Chloride ion Cl⁻
- 219 mg/kg
- Hydroxide ion OH⁻
- 0.40 mg/kg
- Hydrogen sulfide ion HS⁻
- 2.9 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 33.6 mg/kg
- Bicarbonate ion HCO₃⁻
- 167 mg/kg
- Carbonate ion CO₃²⁻
- 10.8 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Metaborate ion BO₂⁻
- 5.5 mg/kg
- Total anions
- 0.44 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 15.3 mg/kg
- Total undissociated
- 0.02 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.68 mg/kg
- Component total
- 0.68 mg/kg
- Evaporation residue
- 0.62 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration
- General indications
- High blood pressure (mild), Rheumatoid arthritis, 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), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable
