Yamanashi-ken Kigyo-kyoku Isawa Onsen Kanrijimusho Kyutoguchi
Analysis UnverifiedThis relatively new source, accidentally discovered in Isawa Onsen's vineyards in Showa 36 (1961), offers highly alkaline waters exceeding pH9. Its unique, serum-like texture gently envelops the skin, naturally aiding in the removal of old keratin and promoting silky skin. The warmth, slowly permeating to the body's core, is expected to melt away daily fatigue and bring about deep relaxation.
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.
With a high alkalinity of pH 9.08, this water can easily remove natural skin oils. Avoid long soaks; instead, take repeated baths of 10-15 minutes. Be sure to moisturize your skin after bathing to prevent dryness.
Known as "Bijin-no-yu" (water for beautiful skin), this hot spring with a high pH of 9.08 gently removes old keratin, leaving the skin smooth. The 45.9°C water warms the body to the core, helping to relieve muscle stiffness and fatigue. It offers a refreshing experience for both mind and body, perfect for those feeling stressed or tired.
Information on contraindications and indications is on a separate sheet. As a general precaution, drinking the water is not permitted. Those with sensitive skin should be mindful of potential irritation from the high alkalinity.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yamanashi-ken Kigyo-kyoku Isawa Onsen Kanrijimusho Kyutoguchi
- Spring type
- Alkaline simple spring
- Source temperature
- 45.9℃
- pH
- 9.08
- Osmotic pressure
- Hypotonic
Analysis Document
- Analysis date
- 2012-08-06
- Analyst organization
- 社団法人 山梨県食品衛生協会
- Registration No.
- 16山梨み自第4号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Lithium ion Li⁺
- 0.10 mg/kg
- Sodium ion Na⁺
- 94.5 mg/kg
- Potassium ion K⁺
- 1.6 mg/kg
- Ammonium ion NH₄⁺
- 0.30 mg/kg
- Magnesium ion Mg²⁺
- 0.00 mg/kg
- Calcium ion Ca²⁺
- 7.6 mg/kg
- Aluminum ion Al³⁺
- 0.10 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.00 mg/kg
- Barium ion Ba²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Total cations
- 0.10 mg/kg
Anions
- Fluoride ion F⁻
- 1.2 mg/kg
- Chloride ion Cl⁻
- 79.5 mg/kg
- Hydroxide ion OH⁻
- 0.20 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 61.1 mg/kg
- Bicarbonate ion HCO₃⁻
- 26.8 mg/kg
- Carbonate ion CO₃²⁻
- 20.4 mg/kg
- Bromide ion Br⁻
- 0.30 mg/kg
- Iodide ion I⁻
- 0.00 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Arsenite ion AsO₂⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.00 mg/kg
- Metaborate ion BO₂⁻
- 0.00 mg/kg
- Total anions
- 0.19 mg/kg
Undissociated Components
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.40 mg/kg
- Metasilicic acid H₂SiO₃
- 49.6 mg/kg
- Metaboric acid HBO₂
- 5.2 mg/kg
- Total undissociated
- 0.06 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
- 0.35 mg/kg
- Component total
- 0.35 mg/kg
- Evaporation residue
- 0.44 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- Recycled / 昭和47年から従量循環方式に変更、資源の有効利用のため
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression
- 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)
Drinking
- Drinkability
- Not drinkable
