Shidotaira Onsen (Take-no-yu)
Analysis UnverifiedTake-no-yu is the hottest of Shidotaira Onsen's three sources, rising at 78.6°C and pumped from a drilled well. As a simple spring that is not overly mineral-heavy, it feels soft on the skin and is gentle enough for children and older bathers alike. A faint hint of hydrogen sulfide and fine bubbles add the charm of a mountain spring—ideal for anyone wanting to unwind body and mind.
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.
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 is very hot at 78.6°C, so check the tub temperature first. Simple springs are mild and invite long soaks, but take breaks and favor cooler tubs to avoid overheating.
With a total mineral content of 0.946 g/kg, this gentle simple spring places little strain on the body and invites deep relaxation. Its weakly alkaline pH of 8.2 may leave skin smooth, offering a rejuvenating pause from travel fatigue.
Because the source is very hot, avoid long soaks in hotter tubs and watch for dizziness. Do not bathe when unwell or after drinking, and hydrate before and after.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Shidotaira Onsen (Take-no-yu)
- Spring type
- Simple Hot Spring
- Source temperature
- 78.6℃
- pH
- 8.2
- Flow rate
- 91.9 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-06-19
- Analyst organization
- 株式会社大東環境科学
- Registration No.
- 岩手県第4号
Cations
- Hydrogen ion H⁺
- < 0.1 mg/kg
- Lithium ion Li⁺
- 0.20 mg/kg
- Sodium ion Na⁺
- 217 mg/kg
- Potassium ion K⁺
- 4.1 mg/kg
- Ammonium ion NH₄⁺
- 0.10 mg/kg
- Calcium ion Ca²⁺
- 56.2 mg/kg
- Strontium ion Sr²⁺
- 0.50 mg/kg
- Total cations
- 0.28 mg/kg
Anions
- Fluoride ion F⁻
- 7.7 mg/kg
- Chloride ion Cl⁻
- 106 mg/kg
- Hydrogen sulfide ion HS⁻
- < 0.1 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.1 mg/kg
- Sulfate ion SO₄²⁻
- 434 mg/kg
- Bicarbonate ion HCO₃⁻
- 40.7 mg/kg
- Bromide ion Br⁻
- 0.20 mg/kg
- Iodide ion I⁻
- < 0.1 mg/kg
- Nitrate ion NO₃⁻
- 0.10 mg/kg
- Total anions
- 0.59 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.20 mg/kg
- Metasilicic acid H₂SiO₃
- 60.4 mg/kg
- Metaboric acid HBO₂
- 11.8 mg/kg
- Total undissociated
- 0.07 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 6.6 mg/kg
- Free hydrogen sulfide H₂S
- < 0.1 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Total dissolved substances
- 0.94 mg/kg
- Component total
- 0.95 mg/kg
- Evaporation residue
- 0.92 mg/kg
Usage
- Usage status
- Unknown
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
