Dai-9-go / Dai-10-go no Kongo
Analysis VerifiedThe 'Mixed Source No. 9 and 10' naturally gushes from the riverbed of the Toyohira River, which flows through Jozankei Onsen. By blending multiple private sources, this unique and rich hot spring water is created. A gentle salt veil envelops the skin, delivering warmth deep into the body's core, and a pleasant restorative warmth lingers long after bathing. This blessing from the earth is especially recommended for those seeking to release daily fatigue and experience 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.).
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.
Since this is an exceptionally hot source exceeding 60°C, areas near the outlet can be intensely heated. Outside the bathing season, water temperature is adjusted through flow volume rather than dilution—stir the water gently before settling in slowly to acclimate comfortably.
Rich in dissolved minerals totaling 3.135 g/kg, this chloride spring coats the skin with a protective thermal veil. Its sustained warmth combats poor circulation and frigidity—the moisturizing and heat-retaining properties linger long after bathing, wrapping your body in lasting comfort.
Avoid bathing during fever or when experiencing active heart disease. This spring water is not for drinking.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Dai-9-go / Dai-10-go no Kongo
- Spring type
- ナトリウム－塩化物温泉
- Old spring type name
- 弱食塩泉
- Source temperature
- 76.4℃
- pH
- 6.6
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2014-11-21
- Analyst organization
- 一般財団法人 北海道薬剤師会公衆衛生検査センター
- Registration No.
- 北海道第2号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 829 mg/kg
- Potassium ion K⁺
- 153 mg/kg
- Ammonium ion NH₄⁺
- 1.4 mg/kg
- Magnesium ion Mg²⁺
- 7.0 mg/kg
- Calcium ion Ca²⁺
- 102 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.90 mg/kg
- Iron(II) ion Fe²⁺
- 0.70 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Total cations
- 1.1 mg/kg
Anions
- Fluoride ion F⁻
- 1.4 mg/kg
- Chloride ion Cl⁻
- 1372 mg/kg
- Hydroxide ion OH⁻
- 0.00 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 90.2 mg/kg
- Bicarbonate ion HCO₃⁻
- 279 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 3.5 mg/kg
- Total anions
- 1.7 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 4.9 mg/kg
- Metasilicic acid H₂SiO₃
- 146 mg/kg
- Metaboric acid HBO₂
- 145 mg/kg
- Total undissociated
- 0.30 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 91.1 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.09 mg/kg
Totals
- Total dissolved substances
- 3.1 mg/kg
- Component total
- 3.2 mg/kg
- Evaporation residue
- 2.9 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
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
- Drinking notes
- Not for drinking.
