Kanaguya Hotel No.1 Boring Source
Analysis UnverifiedShibu Onsen, said to have been discovered by the monk Gyoki in the Nara period, is home to the No.1 Boring source, which gushes up on its own from a deep borehole at 97.6°C, close to boiling. Nearly clear and carrying a faint whiff of sulfur, the water wraps the body in salty, sulfate-rich warmth yet leaves a light, refreshed feeling afterwards. It suits travelers pausing between cobbled bathhouse visits and anyone seeking deep warmth on a cold mountain night.
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.
The source emerges at 97.6°C, so baths can run very hot. Pour water over yourself, check the temperature, and soak in short spells. Remove silver jewelry, as the sulfur content can tarnish it.
With 536 mg/kg of chloride forming a light film on the skin, this water may support Restorative warmth long after bathing. Its pH 8.2 weakly alkaline character and sulfur content are traditionally associated with Silky skin, ideal after a chilly day in the mountains.
The source is extremely hot; beware of scalding and dizziness, keep soaks short if you have heart or blood-pressure concerns, and note sulfur may tarnish metals.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kanaguya Hotel No.1 Boring Source
- Spring type
- Sulfur-containing Sodium-Calcium Chloride and Sulfate Hot Spring
- Source temperature
- 97.6℃
- pH
- 8.2
- Flow rate
- 51.9 L/min
- Flow type
- 掘削自噴
- 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⁺
- 1.1 mg/kg
- Sodium ion Na⁺
- 367 mg/kg
- Potassium ion K⁺
- 40.6 mg/kg
- Magnesium ion Mg²⁺
- 0.30 mg/kg
- Calcium ion Ca²⁺
- 107 mg/kg
- Aluminum ion Al³⁺
- trace
- Manganese ion Mn²⁺
- 0.05 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.50 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.52 mg/kg
Anions
- Fluoride ion F⁻
- 1.3 mg/kg
- Chloride ion Cl⁻
- 536 mg/kg
- Hydrogen sulfide ion HS⁻
- 2.2 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.09 mg/kg
- Sulfate ion SO₄²⁻
- 315 mg/kg
- Bicarbonate ion HCO₃⁻
- 50.4 mg/kg
- Carbonate ion CO₃²⁻
- 6.0 mg/kg
- Bromide ion Br⁻
- 2.7 mg/kg
- Iodide ion I⁻
- 0.60 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.70 mg/kg
- Total anions
- 0.91 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 1.6 mg/kg
- Metasilicic acid H₂SiO₃
- 217 mg/kg
- Metaboric acid HBO₂
- 76.1 mg/kg
- Total undissociated
- 0.29 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.90 mg/kg
- Free hydrogen sulfide H₂S
- 0.20 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 1.7 mg/kg
- Component total
- 1.7 mg/kg
- Evaporation residue
- 1.6 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration, 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), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable
