Jozankei Onsen (Mixed)
Analysis VerifiedNaturally gushing from the riverbed and banks of the Toyohira River, which flows through the heart of Jozankei Onsen, this source's waters are collected without mechanical pumps. Its pristine freshness, embodying the earth's blessings, is truly captivating. A gentle, saline veil envelops the skin, delivering restorative warmth deep into the body's core, ensuring a blissful, lasting afterglow. It's an invitation for those who yearn to be embraced by nature's vigor and experience deep relaxation from the depths of their mind and body.
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.
- Chloride (salt)1623 mg/kg
- Feel
- Tastes salty; the warmth lasts after you get out.
- Said to
- Salt is said to form a film on the skin that keeps in heat and moisture. Bathing indications include cuts, poor circulation and dry skin.
- Note
- May sting cuts. Strong salty water can tire you—avoid long soaks.
- Metasilicic acid114 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature64.9℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
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.
Rich in salt content, after bathing simply pat yourself dry with a towel rather than rinsing off with shower water—this locks in the warming effect for hours longer. Since rapid immersion in hot water may cause dizziness, bathe mindfully for shorter intervals to allow your body to acclimate gently.
This sodium chloride spring, boasting over 3.5g/kg in total mineral content, deposits a thin protective saline film across the skin, preventing heat loss long after bathing. Particularly beneficial for those suffering from poor circulation, stiff joints, and chronic muscle tension, it warms you from your core outward with a penetrating, lingering heat that relieves deep-seated discomfort.
Those with acute illness, active tuberculosis, or severe heart disease should refrain from bathing. Avoid entering hot water immediately before meals or after alcohol consumption.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Jozankei Onsen (Mixed)
- Spring type
- ナトリウム-塩化物温泉
- Old spring type name
- 弱食塩泉
- Source temperature
- 64.9℃
- pH
- 7.2
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2012-02-07
- Analyst organization
- 北海道立衛生研究所
- Registration No.
- 北海道第1号
Cations
- Sodium ion Na⁺
- 943 mg/kg
- Potassium ion K⁺
- 145 mg/kg
- Ammonium ion NH₄⁺
- 0.30 mg/kg
- Magnesium ion Mg²⁺
- 6.8 mg/kg
- Calcium ion Ca²⁺
- 117 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.90 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 mg/kg
- Zinc ion Zn²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 1213 mg/kg
Anions
- Fluoride ion F⁻
- 0.50 mg/kg
- Chloride ion Cl⁻
- 1623 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 87.2 mg/kg
- Bicarbonate ion HCO₃⁻
- 287 mg/kg
- Carbonate ion CO₃²⁻
- 0.30 mg/kg
- Total anions
- 1998 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 4.7 mg/kg
- Metasilicic acid H₂SiO₃
- 114 mg/kg
- Metaboric acid HBO₂
- 173 mg/kg
- Total undissociated
- 293 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 34.5 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 34.5 mg/kg
Trace Components
- Radon Rn
- 0.07 マッヘ単位/kg
Totals
- Total dissolved substances
- 3504 mg/kg
- Component total
- 3539 mg/kg
- Evaporation residue
- 3325 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
- Drinking indications
- Atrophic gastritis, Constipation
- 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
- Drinkable
- Drinking notes
- It is recommended to consult a doctor before drinking the spring water.
