Jozankei Onsen
Analysis VerifiedDiscovered in 1866 by the monk Miizumi Jozan, the Jozankei Onsen sources naturally gush from the rocky bed of the Toyohira River. The water bubbles up abundantly at about 8,600 liters per minute across the town. Established in 1934, Shogetsu Grand Hotel generously draws from five of these sources to provide free-flowing spring water for its baths. Bathing in this clear, slightly salty water allows you to deeply soothe your mind and body while admiring the beautiful seasonal changes of the valley.
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.
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.
Since the source water gushes out at a very high temperature of 77.5℃, cold water is added to adjust it to a comfortable 40-42℃. The chloride forms a salt film on your skin, keeping you warm long after bathing. It is recommended to gently towel dry without rinsing off the spring water.
This is a gentle, neutral sodium-chloride spring with a pH of 6.4. Containing 926.5mg of sodium ions and 1492mg of chloride ions per kilogram, it provides excellent heat-retaining effects. It is perfect for those suffering from poor circulation or peripheral circulatory failure, leaving you with a lingering warmth.
Please refrain from bathing if you have a fever, active tuberculosis, or severe heart, lung, or kidney conditions. Note that this water is not safe for drinking.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- 定山渓温泉
- Spring type
- ナトリウム－塩化物温泉
- Old spring type name
- 弱食塩泉
- Source temperature
- 77.5℃
- pH
- 6.4
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2020-06-09
- Analyst organization
- 日本衛生株式会社
- Registration No.
- 北海道第11号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 927 mg/kg
- Potassium ion K⁺
- 161 mg/kg
- Ammonium ion NH₄⁺
- 1.5 mg/kg
- Magnesium ion Mg²⁺
- 7.5 mg/kg
- Calcium ion Ca²⁺
- 116 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.90 mg/kg
- Iron(II) ion Fe²⁺
- 0.20 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Zinc ion Zn²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.00 mg/kg
- Barium ion Ba²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 1.2 mg/kg
Anions
- Fluoride ion F⁻
- 1.5 mg/kg
- Chloride ion Cl⁻
- 1492 mg/kg
- Hydroxide ion OH⁻
- 0.00 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 80.9 mg/kg
- Bicarbonate ion HCO₃⁻
- 307 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Bromide ion Br⁻
- 3.3 mg/kg
- Iodide ion I⁻
- 0.90 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Hydrogen thiosulfate HS₂O₃⁻
- 0.00 mg/kg
- Nitrite ion NO₂⁻
- 0.00 mg/kg
- Nitrate ion NO₃⁻
- 0.00 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.30 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Phosphate ion PO₄³⁻
- 0.00 mg/kg
- Arsenite ion AsO₂⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.00 mg/kg
- Metasilicate ion SiO₃²⁻
- 0.00 mg/kg
- Metaborate ion BO₂⁻
- 0.00 mg/kg
- Total anions
- 1.9 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 4.5 mg/kg
- Metasilicic acid H₂SiO₃
- 144 mg/kg
- Metaboric acid HBO₂
- 140 mg/kg
- Total undissociated
- 0.29 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 79.2 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.08 mg/kg
Trace Components
- Radon Rn
- 0
- Total sulfur S
- 0.00 mg/kg
Totals
- Total dissolved substances
- 3.4 mg/kg
- Component total
- 3.5 mg/kg
- Evaporation residue
- 3.1 mg/kg
Usage
- Heating
- No
- Dilution
- Yes（Cold water is added to adjust the bath temperature to between 40℃ and 42℃.）
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Chronic pain or stiffness in muscles and joints (rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, chronic phase of bruises and sprains), muscle stiffness due to motor paralysis, gastrointestinal dysfunction (stomach heaviness, intestinal gas, etc.), high blood pressure (mild), impaired glucose tolerance (diabetes), mild hypercholesterolemia, mild asthma or emphysema, autonomic instability, hemorrhoid pain, stress-related symptoms (insomnia, depression, etc.), convalescence, fatigue recovery, health promotion, cuts and grazes, peripheral circulatory failure, poor circulation, depression, xeroderma
- Contraindications
- Active phase of diseases (especially with fever), active tuberculosis, advanced malignant tumors or severe anemia resulting in significant physical weakness, severe heart or lung conditions causing shortness of breath with slight movement, severe kidney disease with edema, gastrointestinal bleeding, visible bleeding, and acute exacerbation of chronic diseases
Drinking
- Drinkability
- Not drinkable
- Drinking notes
- This hot spring is not to be used for drinking.
