Hakone Ginyu Private Source
Analysis UnverifiedMiyanoshita, counted among the Seven Springs of Hakone and beloved by foreign travelers since the Meiji era, is home to this private source drawn from two wells dug into the valley. Emerging at 52.6°C, the mildly alkaline chloride water feels soft on the skin and leaves a lingering, salt-wrapped warmth. It suits travelers who want to unwind slowly while gazing across the Hakone mountains.
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.
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 source emerges at 52.6°C, so check the bath temperature first. Chloride water keeps you warm long after bathing, so avoid overly long soaks, drink water afterward, and rinse only lightly to keep the warming effect.
With 472 mg/kg of chloride, this salty water forms a thin film that helps hold in heat, traditionally associated with restorative warmth. Its pH 8.4 and 103 mg/kg of metasilicic acid may also leave silky skin, ideal on chilly days.
As this is a hot spring source, watch the water temperature and rest regularly to avoid dizziness. Avoid bathing when unwell or after drinking alcohol.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Hakone Ginyu Private Source
- Spring type
- Sodium Chloride Spring (Hypotonic Mildly alkaline high-temperature hot spring)
- Old spring type name
- 純弱食塩泉
- Source temperature
- 52.6℃
- pH
- 8.4
- Flow rate
- 120 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2007-12-20
- Analyst organization
- 神奈川県温泉地学研究所
Cations
- Lithium ion Li⁺
- 0.45 mg/kg
- Sodium ion Na⁺
- 321 mg/kg
- Potassium ion K⁺
- 25.0 mg/kg
- Magnesium ion Mg²⁺
- 3.0 mg/kg
- Calcium ion Ca²⁺
- 31.8 mg/kg
- Aluminum ion Al³⁺
- 0.02 mg/kg
- Manganese ion Mn²⁺
- 0.06 mg/kg
- Iron(II) ion Fe²⁺
- 0.17 mg/kg
- Zinc ion Zn²⁺
- 0.12 mg/kg
- Lead ion Pb²⁺
- 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.05 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.38 mg/kg
Anions
- Fluoride ion F⁻
- 0.14 mg/kg
- Chloride ion Cl⁻
- 472 mg/kg
- Sulfate ion SO₄²⁻
- 55.7 mg/kg
- Bicarbonate ion HCO₃⁻
- 76.1 mg/kg
- Carbonate ion CO₃²⁻
- 5.8 mg/kg
- Bromide ion Br⁻
- 0.95 mg/kg
- Nitrate ion NO₃⁻
- 1.6 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 20.4 mg/kg
- Metaborate ion BO₂⁻
- 9.1 mg/kg
- Total anions
- 0.64 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 103 mg/kg
- Metaboric acid HBO₂
- 14.8 mg/kg
- Total undissociated
- 0.12 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.08 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 1.1 mg/kg
- Component total
- 1.1 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
