Kamakura-buro Mixed Source (Hira no Yu and Tera no Yu)
Analysis UnverifiedThis blend joins Hira no Yu from Arai-gawara, regarded as the heart of Shibu Onsen's waters, with Tera no Yu rising in the grounds of Onsen-ji temple, and has long been piped communally through the town. White mineral flakes drift in the mildly acidic water, whose faint salty-bitter taste recalls Shibu's old bathing heritage. It tones the skin while sulfate warmth seeps deep, suiting those savoring classic Shibu water or a slow, healing stay.
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.
At 54.4°C the source runs hot, so pour water over yourself and soak a few minutes at a time. Its pH 5.3 mild acidity may sting sensitive skin; rinse lightly and moisturize afterwards.
Rich in 378 mg/kg of sulfate, this water is traditionally associated with helping Relieve pain, while 260 mg/kg of chloride may support Restorative warmth, suiting stiff shoulders or a chilled body on a cold night.
The 54°C source is hot; avoid long soaks, bathe briefly if you have heart or blood-pressure concerns, and rinse with fresh water if your skin is sensitive.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kamakura-buro Mixed Source (Hira no Yu and Tera no Yu)
- Spring type
- Sodium-Calcium Sulfate and Chloride Hot Spring
- Source temperature
- 54.4℃
- pH
- 5.3
- Flow rate
- 20.9 L/min
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2008-09-20
- Analyst organization
- 社団法人上田薬剤師会 検査センター
- Registration No.
- 長野県第7号
Cations
- Lithium ion Li⁺
- 0.50 mg/kg
- Sodium ion Na⁺
- 193 mg/kg
- Potassium ion K⁺
- 40.9 mg/kg
- Magnesium ion Mg²⁺
- 7.5 mg/kg
- Calcium ion Ca²⁺
- 105 mg/kg
- Aluminum ion Al³⁺
- 2.5 mg/kg
- Manganese ion Mn²⁺
- 0.40 mg/kg
- Iron(II) ion Fe²⁺
- 0.50 mg/kg
- Zinc ion Zn²⁺
- trace
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.40 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.35 mg/kg
Anions
- Fluoride ion F⁻
- 1.0 mg/kg
- Chloride ion Cl⁻
- 260 mg/kg
- Sulfate ion SO₄²⁻
- 378 mg/kg
- Bicarbonate ion HCO₃⁻
- 3.1 mg/kg
- Bromide ion Br⁻
- 1.5 mg/kg
- Iodide ion I⁻
- 0.30 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.07 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.50 mg/kg
- Total anions
- 0.64 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.40 mg/kg
- Metasilicic acid H₂SiO₃
- 149 mg/kg
- Metaboric acid HBO₂
- 36.4 mg/kg
- Total undissociated
- 0.19 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 19.1 mg/kg
- Total dissolved gas
- 0.02 mg/kg
Totals
- Total dissolved substances
- 1.2 mg/kg
- Component total
- 1.2 mg/kg
- Evaporation residue
- 1.2 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
