No. 1 Well
Analysis UnverifiedHot springs opened on the shore of caldera Lake Shikotsu in 1915, and until a road was built the area could be reached only by boat. It is known for a pool where water wells up through the gravel underfoot, and several sources of the same spring type flow nearby. At 50.3°C, the No. 1 Well is among the hottest. Chloride, bicarbonate and sulfate dissolve in balance, rich enough to build mineral deposits around the spout, suiting anyone who wants to warm up quietly while gazing at the lake.
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.
Absorbed through the skin to gently promote peripheral circulation.
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 runs hot at 50.3°C, so check the bath temperature before sinking in. Chloride helps the warmth linger after bathing, so keep soaks moderate and drink water often.
With 363.3 mg/kg of chloride, the water may wrap the skin and leave a lasting, restorative warmth. Its 249.2 mg/kg of sulfate is traditionally associated with easing stiff muscles and may help relieve pain on a cool northern lakeshore.
The source is very hot, so beware of burns and overheating. Avoid bathing during acute illness, with serious heart or kidney conditions, or after drinking alcohol.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- No. 1 Well
- Spring type
- Sodium-Calcium Chloride, Bicarbonate and Sulfate Hot Spring
- Source temperature
- 50.3℃
- pH
- 6.3
- Flow rate
- 120 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2019-10-10
- Analyst organization
- 日本衛生株式会社
- Registration No.
- 北海道 第11号
Cations
- Sodium ion Na⁺
- 277 mg/kg
- Potassium ion K⁺
- 32.1 mg/kg
- Ammonium ion NH₄⁺
- 0.80 mg/kg
- Magnesium ion Mg²⁺
- 36.5 mg/kg
- Calcium ion Ca²⁺
- 119 mg/kg
- Aluminum ion Al³⁺
- not detected
- Manganese ion Mn²⁺
- 0.80 mg/kg
- Iron(II) ion Fe²⁺
- 2.7 mg/kg
- Zinc ion Zn²⁺
- 0.01 mg/kg
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- 0.02 mg/kg
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 0.47 mg/kg
Anions
- Fluoride ion F⁻
- 0.80 mg/kg
- Chloride ion Cl⁻
- 363 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 249 mg/kg
- Bicarbonate ion HCO₃⁻
- 382 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Bromide ion Br⁻
- 0.40 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.40 mg/kg
- Total anions
- 1.00 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.80 mg/kg
- Metasilicic acid H₂SiO₃
- 227 mg/kg
- Metaboric acid HBO₂
- 34.4 mg/kg
- Total undissociated
- 0.26 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 187 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.19 mg/kg
Totals
- Total dissolved substances
- 1.7 mg/kg
- Component total
- 1.9 mg/kg
- Evaporation residue
- 1.5 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
