Yakushinoyu No. 3 Well
Analysis UnverifiedMurasugi Onsen is said to have been found in 1335, when Araki Masataka, a retainer of the Ashikaga clan fleeing war, dreamed of the Healing Buddha seven nights in a row, giving the spa some 700 years of history. Yakushinoyu No. 3 Well carries that name, gushing from a drilled well in Murasugi and supplying the inns of the spa town. Known since the Taisho era for its rich radon, the clear, mild water seems ordinary, yet soaking and breathing its steam lets a gentle warmth spread from within, suiting anyone seeking an unhurried toji stay among quiet cedar groves.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A rare radioactive spring where trace radiation absorbed via inhalation and skin is expected to stimulate cells (the "hormesis effect").
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 only 25.2°C, so baths are served warmed. Radon is best taken in with the steam, so sink to your shoulders, breathe deeply, and linger in lukewarm water for a longer soak.
Holding 136.6×10⁻¹⁰ Ci/kg of radon, this radioactive spring is traditionally associated with helping relieve pain from gout and stiff joints, and breathing its steam may support immune system stimulation on days of built-up fatigue.
If unwell or living with a chronic condition, keep soaks short, and cut back on bathing if signs of yuatari (bath fatigue) appear.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Yakushinoyu No. 3 Well
- Spring type
- Simple Hot Spring
- Source temperature
- 25.2℃
- pH
- 8.6
- Flow rate
- 510 L/min
- Flow type
- 掘削自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2011-05-02
- Analyst organization
- 一般財団法人 新潟県環境分析センター
- Registration No.
- 新潟県（登）環企第4号
Cations
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 50.4 mg/kg
- Potassium ion K⁺
- 1.4 mg/kg
- Ammonium ion NH₄⁺
- 0.40 mg/kg
- Magnesium ion Mg²⁺
- 0.30 mg/kg
- Calcium ion Ca²⁺
- 28.3 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Zinc ion Zn²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- < 0.005 mg/kg
- Strontium ion Sr²⁺
- 0.30 mg/kg
- Barium ion Ba²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 0.08 mg/kg
Anions
- Fluoride ion F⁻
- 0.60 mg/kg
- Chloride ion Cl⁻
- 9.5 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.00 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 84.4 mg/kg
- Bicarbonate ion HCO₃⁻
- 36.6 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Bromide ion Br⁻
- 0.00 mg/kg
- Iodide ion I⁻
- 0.30 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Nitrite ion NO₂⁻
- 0.00 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Total anions
- 0.13 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 26.2 mg/kg
- Metaboric acid HBO₂
- 0.10 mg/kg
- Total undissociated
- 0.03 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.20 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Trace Components
- Radon Rn
- 505.4 Bq/kg
Totals
- Total dissolved substances
- 0.24 mg/kg
- Component total
- 0.24 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Hyperuricemia (gout), Rheumatoid arthritis, Ankylosing spondylitis
- General indications
- High blood pressure (mild), Autonomic instability, Insomnia, Depression, 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), Undergoing radiation therapy, pregnancy (radioactive springs)
Drinking
- Drinkability
- Not drinkable