Kaminoyu Onsen (Spring: Yumoto Seiryuen)
Analysis UnverifiedKaminoyu Onsen is a quiet spa in the hills beyond central Yakumo. Seiryuen's spring gushes naturally at 98°C and 60 liters per minute; because it is so hot, the water is tempered with added water, yet both indoor and outdoor baths are free-flowing. The salty water can turn faintly milky, and in the open-air bath a long hose is used to cool it on the way in.
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.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
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 water is hot near the inlet and milder farther away, so ease in away from the spout. The dense salt water warms you quickly, so keep soaks moderate, and watch your footing in the open-air bath, where cloudy water hides the rocks.
With 2,397 mg/kg chloride, the salts coat the skin and may support restorative warmth that lasts after bathing, while 1,295 mg/kg sulfate is traditionally associated with helping relieve pain.
The source is 98°C, so beware of hot water near the inlet, keep soaks short to avoid overheating in the dense salt water, and mind the rocks underfoot in the open-air bath.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kaminoyu Onsen (Spring: Yumoto Seiryuen)
- Spring type
- Sodium Chloride and Sulfate Spring
- Source temperature
- 98℃
- pH
- 8.4
- Flow rate
- 60 L/min
- Flow type
- 自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2002-07-31
- Analyst organization
- 北海道立衛生研究所
- Registration No.
- 北海道第1号
Cations
- Sodium ion Na⁺
- 2323 mg/kg
- Potassium ion K⁺
- 124 mg/kg
- Ammonium ion NH₄⁺
- 0.50 mg/kg
- Magnesium ion Mg²⁺
- 8.7 mg/kg
- Calcium ion Ca²⁺
- 19.1 mg/kg
- Aluminum ion Al³⁺
- 0.01 mg/kg
- Manganese ion Mn²⁺
- 0.03 mg/kg
- Iron(II) ion Fe²⁺
- 0.40 mg/kg
- Zinc ion Zn²⁺
- not detected
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- not detected
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 2.5 mg/kg
Anions
- Fluoride ion F⁻
- 2.0 mg/kg
- Chloride ion Cl⁻
- 2397 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.40 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 1295 mg/kg
- Bicarbonate ion HCO₃⁻
- 656 mg/kg
- Carbonate ion CO₃²⁻
- 84.9 mg/kg
- Total anions
- 4.4 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 153 mg/kg
- Metaboric acid HBO₂
- 131 mg/kg
- Total undissociated
- 0.28 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 4.4 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 7.2 mg/kg
- Component total
- 7.2 mg/kg
- Evaporation residue
- 6.7 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
