Bisui & Nanatsugama Mixed Spring
Analysis UnverifiedThe Bisui & Nanatsugama Mixed Spring draws mainly on a spring rising on site in Kamisuwa Onsen beside Lake Suwa. Hot at over 55°C yet gentle in composition, this mildly alkaline simple spring feels silky and calm, like a quiet, embracing companion.
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 exceeds 55°C and the top layer heats up quickly, so stir the bath and check the temperature first. Being mild and low-irritant, it suits a long, lukewarm soak. Hydrate afterwards.
With pH 8.45 and 93 mg/kg of metasilicic acid, this mildly alkaline water may soften the skin for a silky skin feel. As a gentle simple spring, it is easy on the body, and a long lukewarm soak invites deep relaxation by the quiet lakeside.
The source is very hot, so beware of the spout and the top layer. Avoid dizziness from long soaks, stay hydrated, and skip bathing when unwell or after drinking.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Bisui & Nanatsugama Mixed Spring
- Spring type
- Simple Hot Spring
- Source temperature
- 55.3℃
- pH
- 8.45
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2017-04-24
- Analyst organization
- 株式会社コーエキ
- Registration No.
- 長野県知事登録第4号
Cations
- Lithium ion Li⁺
- 0.30 mg/kg
- Sodium ion Na⁺
- 140 mg/kg
- Potassium ion K⁺
- 6.1 mg/kg
- Ammonium ion NH₄⁺
- 0.10 mg/kg
- Magnesium ion Mg²⁺
- 0.30 mg/kg
- Calcium ion Ca²⁺
- 15.6 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.20 mg/kg
- Cadmium ion Cd²⁺
- < 0.005 mg/kg
- Total cations
- 162 mg/kg
Anions
- Fluoride ion F⁻
- 2.1 mg/kg
- Chloride ion Cl⁻
- 130 mg/kg
- Sulfate ion SO₄²⁻
- 85.5 mg/kg
- Bicarbonate ion HCO₃⁻
- 79.3 mg/kg
- Carbonate ion CO₃²⁻
- 6.0 mg/kg
- Nitrate ion NO₃⁻
- 1.3 mg/kg
- Total anions
- 304 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- 0.30 mg/kg
- Metasilicic acid H₂SiO₃
- 93.0 mg/kg
- Metaboric acid HBO₂
- 9.5 mg/kg
- Total undissociated
- 103 mg/kg
Totals
- Total dissolved substances
- 569 mg/kg
- Component total
- 569 mg/kg
- Evaporation residue
- 520 mg/kg
Usage
- Heating
- No
- Dilution
- Yes（貸切風呂・客室露天は源泉かけ流しだが、湯口横のカラン（源泉・湯・水）で入浴者が自由に加水できる（温泉手帖 2025年9月宿泊記）。大浴場も加水あり。）
- 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
