Bijinyu
Analysis UnverifiedOkutsu Onsen, one of the three historic hot springs of Mimasaka, lines the Yoshii River. Bijinyu is a drilled, pump-lifted source here yielding 150 liters per minute. Its pH 9.3 alkalinity gives the water a silky glide, earning its "beauty bath" name among bathers who favor long, gentle soaks.
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.
At 39.0°C, Bijinyu is warmed for bathing. Because its pH 9.3 alkalinity lifts skin oils readily, go light on soap and moisturize after a long soak to keep the silky finish.
With pH 9.3 alkalinity plus 44.7 mg/kg of bicarbonate and 8.4 mg/kg of carbonate, Bijinyu gently softens the outer layer of skin, leaving a silky-skin feel. As a mild simple spring, it may also support deep relaxation during unhurried soaks.
Though mild, this alkaline water strips skin oils easily, so dry-skinned bathers should moisturize afterward. Avoid bathing after drinking alcohol and rehydrate regularly.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Bijinyu
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 39℃
- pH
- 9.3
- Flow rate
- 150 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2004-12-27
Cations
- Sodium ion Na⁺
- 39.0 mg/kg
- Potassium ion K⁺
- 0.50 mg/kg
- Calcium ion Ca²⁺
- 3.2 mg/kg
- Manganese ion Mn²⁺
- < 0.01 mg/kg
- Zinc ion Zn²⁺
- < 0.01 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Total cations
- 0.04 mg/kg
Anions
- Fluoride ion F⁻
- 1.7 mg/kg
- Chloride ion Cl⁻
- 7.5 mg/kg
- Sulfate ion SO₄²⁻
- 10.4 mg/kg
- Bicarbonate ion HCO₃⁻
- 44.7 mg/kg
- Carbonate ion CO₃²⁻
- 8.4 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.10 mg/kg
- Total anions
- 0.07 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 48.0 mg/kg
- Metaboric acid HBO₂
- 0.90 mg/kg
- Total undissociated
- 0.05 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
- 0.16 mg/kg
- Component total
- 0.16 mg/kg
- Evaporation residue
- 0.09 mg/kg
Usage
- Usage status
- Unknown
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