MISORA YUFUIN
Analysis VerifiedThe MISORA YUFUIN source emerges in Yufuin, a hot spring village at the foot of Mt. Yufu. As a gentle alkaline simple spring with low irritation, it is suitable for everyone, from babies to the elderly. Steeping in these waters feels like being enveloped in a rich lotion, its thick texture deeply moisturizing dry skin. In this land surrounded by abundant nature, you can forget the hustle and bustle of daily life and enjoy a tranquil time to release your mind and body.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
A trace component with gentle antibacterial and anti-inflammatory action.
- Alkaline (pH)pH 8.5
- Feel
- Feels slippery and silky on the skin.
- Said to
- Said to remove old skin cells and excess sebum.
- Note
- Skin can dry out afterwards—moisturize after bathing.
- Metasilicic acid130 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature49.4℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
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 alkaline water with a pH of 8.5 is expected to soften the skin's outer layer. A bathing time of 10-15 minutes is recommended; avoid prolonged soaking. As the skin can lose moisture after bathing, apply body lotion immediately to maintain its smoothness.
With a pH of 8.5 and a high content of 130.0 mg/kg of metasilicic acid, a "silky skin" component, this spring is ideal for skin beautification. It may gently remove dead skin cells, leaving your skin moist and smooth. Its low-irritation quality is perfect for days when you seek deep relaxation. Experience a form of balneotherapy that helps restore your skin's natural glow.
Although the spring is gentle, long baths may cause skin dryness. Ensure you hydrate and moisturize well after bathing. If you have health concerns, consult a doctor before bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- MISORA YUFUIN
- Spring type
- Alkaline Simple Hot Spring
- Old spring type name
- 単純温泉
- Source temperature
- 49.4℃
- pH
- 8.5
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2022-12-06
- Analyst organization
- 公益社団法人大分県薬剤師会
- Registration No.
- 大分県第3号
Cations
- Lithium ion Li⁺
- 0.20 mg/kg
- Sodium ion Na⁺
- 96.4 mg/kg
- Potassium ion K⁺
- 7.5 mg/kg
- Magnesium ion Mg²⁺
- 3.2 mg/kg
- Calcium ion Ca²⁺
- 9.8 mg/kg
- Manganese ion Mn²⁺
- 0.10 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.10 mg/kg
- Copper ion Cu²⁺
- < 0.05 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 117 mg/kg
Anions
- Fluoride ion F⁻
- 0.40 mg/kg
- Chloride ion Cl⁻
- 61.4 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.20 mg/kg
- Sulfate ion SO₄²⁻
- 23.5 mg/kg
- Bicarbonate ion HCO₃⁻
- 110 mg/kg
- Carbonate ion CO₃²⁻
- 35.5 mg/kg
- Bromide ion Br⁻
- 0.20 mg/kg
- Nitrate ion NO₃⁻
- 2.0 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.40 mg/kg
- Total anions
- 234 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 130 mg/kg
- Metaboric acid HBO₂
- 2.3 mg/kg
- Total undissociated
- 132 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- < 0.1 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Trace Components
- Radon Rn
- < 7.4 Bq/kg
Totals
- Total dissolved substances
- 483 mg/kg
- Component total
- 483 mg/kg
- Evaporation residue
- 385 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
