Choon R2 Source
Analysis UnverifiedOshamambe Onsen began when hot water gushed out during exploratory drilling for natural gas, and a town-run public bathhouse opened here in 1955. The Choon R2 source, a well bored 621 meters deep in 1991, is shared by the Oshamambe hot spring cooperative among the inns of the spa district. Its briny, sea-like water wraps the skin and lets warmth linger long after bathing, ideal for rail travelers easing into a cold southern Hokkaido 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.
Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").
Salt forms a thin film on the skin, retaining heat after bathing. Helps with poor circulation.
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 49.6°C at the source, some tubs feel very hot. Pour water over yourself first, take several short dips in the hotter tub, and drink water afterward, as the salty spring draws moisture from the body.
With 5,600 mg/kg of chloride, this hypertonic water leaves a fine salt veil on the skin that is traditionally associated with restorative warmth. Its 49.6°C heat may support efforts to relieve pain in stiff shoulders and lower backs, suited to cold winter days or the end of a long journey.
Because the water is hot and highly saline, long soaks can cause dizziness or bathing fatigue. People with high blood pressure or heart concerns should keep baths short.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Choon R2 Source
- Spring type
- Sodium Chloride Spring (Hypertonic Alkaline high-temperature hot spring)
- Old spring type name
- 食塩泉
- Source temperature
- 49.6℃
- pH
- 8
- Flow rate
- 600 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 高張性
Analysis Document
- Analysis date
- 2005-03-24
- Analyst organization
- 財団法人北海道薬剤師会公衆衛生検査センター
- Registration No.
- 北海道第2号
Cations
- Sodium ion Na⁺
- 3478 mg/kg
- Potassium ion K⁺
- 139 mg/kg
- Ammonium ion NH₄⁺
- 19.0 mg/kg
- Magnesium ion Mg²⁺
- 14.5 mg/kg
- Calcium ion Ca²⁺
- 119 mg/kg
- Aluminum ion Al³⁺
- not detected
- Manganese ion Mn²⁺
- 0.10 mg/kg
- Iron(II) ion Fe²⁺
- 0.20 mg/kg
- Zinc ion Zn²⁺
- not detected
- Lead ion Pb²⁺
- not detected
- Copper ion Cu²⁺
- not detected
- Cadmium ion Cd²⁺
- not detected
- Total cations
- 3.8 mg/kg
Anions
- Fluoride ion F⁻
- 0.60 mg/kg
- Chloride ion Cl⁻
- 5600 mg/kg
- Sulfate ion SO₄²⁻
- 1.5 mg/kg
- Bicarbonate ion HCO₃⁻
- 490 mg/kg
- Carbonate ion CO₃²⁻
- 22.3 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.40 mg/kg
- Total anions
- 6.1 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 142 mg/kg
- Metaboric acid HBO₂
- 53.1 mg/kg
- Total undissociated
- 0.20 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 8.2 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Total dissolved substances
- 10.1 mg/kg
- Component total
- 10.1 mg/kg
- Evaporation residue
- 9.4 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
