Asama Onsen No. 2 Source
Analysis UnverifiedAsama Onsen is an ancient spa long loved as the back parlor of Matsumoto's castle town, said to be the "Tsukama no Yu" mentioned in the Nihon Shoki or a spring found by the Inukai clan in the Heian era. In the Edo period the Matsumoto domain kept a lord's bathhouse here, and samurai bathed in separate pools by rank. The No. 2 Source is the main spring supplying the town's inns, pumped up at around 49°C. Its alkaline water, carrying sodium, calcium and sulfate, suits travelers who want a quiet, warming soak steeped in castle-town history.
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 hot at 49°C, so check the bath temperature before entering. Alkaline pH 8.8 water leaves skin smooth but can strip oils, so moisturize afterward and stay warm in Matsumoto's cold winters.
The alkaline pH 8.8 and 36.2 mg/kg of metasilicic acid may help soften the skin's surface for a silky skin feel, while the gently warming water invites deep relaxation in the quiet of the castle town.
Avoid bathing during acute illness or with serious heart or kidney conditions. Mind the hot water temperature, and do not bathe right after drinking alcohol or eating.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Asama Onsen No. 2 Source
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 49.4℃
- pH
- 8.8
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2006-07-18
- Analyst organization
- 社団法人長野県薬剤師会
- Registration No.
- 長野県第2号
Cations
- Lithium ion Li⁺
- 0.04 mg/kg
- Sodium ion Na⁺
- 85.6 mg/kg
- Potassium ion K⁺
- 1.6 mg/kg
- Magnesium ion Mg²⁺
- 0.04 mg/kg
- Calcium ion Ca²⁺
- 31.6 mg/kg
- Aluminum ion Al³⁺
- 0.05 mg/kg
- Iron(II) ion Fe²⁺
- 0.05 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.30 mg/kg
- Barium ion Ba²⁺
- 0.04 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 0.12 mg/kg
Anions
- Fluoride ion F⁻
- 1.4 mg/kg
- Chloride ion Cl⁻
- 31.0 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.20 mg/kg
- Sulfate ion SO₄²⁻
- 194 mg/kg
- Bicarbonate ion HCO₃⁻
- 18.6 mg/kg
- Carbonate ion CO₃²⁻
- 6.0 mg/kg
- Total anions
- 0.25 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 36.2 mg/kg
- Metaboric acid HBO₂
- 0.60 mg/kg
- Total undissociated
- 0.04 mg/kg
Dissolved Gas
- Free hydrogen sulfide H₂S
- trace
Totals
- Total dissolved substances
- 0.41 mg/kg
- Component total
- 0.41 mg/kg
- Evaporation residue
- 0.42 mg/kg
Usage
- Heating
- Yes
- 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
