Setose Onsen
Analysis UnverifiedSetose Onsen is said to have been stumbled upon by deer hunters in the late Meiji era, and in 1954 a 106-meter well finally brought up water near 43°C, with an inn opening in 1956. Still rising without pumps, the clear alkaline water above pH 9 leaves a slippery, gentle touch, suiting bathers who seek an unadorned source in the hush of old-growth forest.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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 a comfortable 42.8°C, the water invites an unhurried soak of 10 to 15 minutes. Its pH 9.3 alkalinity lifts away skin oils, so moisturize after bathing.
With pH 9.3 alkalinity and a mild 42.8°C, this low-mineral simple spring offers a gentle soak that may support deep relaxation and rejuvenation, ideal for unwinding everyday fatigue in a quiet mountain setting.
Though this simple spring is mild, avoid bathing when unwell or after drinking alcohol, and take care not to overstay in the water.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Setose Onsen
- Spring type
- Alkaline Simple Hot Spring
- Old spring type name
- 単純泉
- Source temperature
- 42.8℃
- pH
- 9.3
- Flow type
- 自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2014-07-03
- Analyst organization
- 一般財団法人 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⁺
- 32.5 mg/kg
- Potassium ion K⁺
- 0.60 mg/kg
- Calcium ion Ca²⁺
- 1.8 mg/kg
- Total cations
- 0.03 mg/kg
Anions
- Fluoride ion F⁻
- 1.0 mg/kg
- Chloride ion Cl⁻
- 4.0 mg/kg
- Hydroxide ion OH⁻
- 0.30 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 19.8 mg/kg
- Bicarbonate ion HCO₃⁻
- 12.9 mg/kg
- Carbonate ion CO₃²⁻
- 23.2 mg/kg
- Total anions
- 0.06 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 60.4 mg/kg
- Total undissociated
- 0.06 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.16 mg/kg
- Component total
- 0.16 mg/kg
- Evaporation residue
- 0.14 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, 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
