Bandaiko
Analysis VerifiedThe Bandaiko source is a relatively new spring that suddenly gushed out from inside the Bandai sulfur mine in 1970. [8] Though the mine, named to "prosper for eternity," was closed by the eruption, this source now supports the town as its most voluminous spring. [2, 4] Gushing in the mountains away from the Yubatake, its water is clear, has little sulfur odor, and is known for a sharp, stinging sensation on the skin. [2, 13] Its abundant flow is channeled to many inns and public baths, including the Sainokawara Rotenburo. [2, 4]
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Strong astringent action that tightens skin. A key component of acidic springs, suited to oily or acne-prone skin.
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
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.
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.
With a very high acidity of pH 1.7, this stimulating water may cause a tingling sensation. It can sting sensitive skin or open cuts. Avoid long soaks and start with shorter dips. It's recommended to rinse off with fresh water after bathing.
The defining features of Bandaiko are its high temperature of 94.6°C and its powerful acidity of pH 1.7. This potent acid spring is expected to be effective for skin conditions like atopic dermatitis and psoriasis, as well as for diabetes (impaired glucose tolerance).
Due to its strong acidity, caution is advised for those with sensitive skin or mucous membranes, and for elderly individuals with dry skin. Avoid bathing during active illness or when feeling weak.
※ See the analysis data below for detailed contraindications
Kusatsuonsen Ichii
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ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- 万代鉱
- Spring type
- 酸性水素一硫酸塩・塩化物温泉
- Old spring type name
- 酸性明礬泉
- Source temperature
- 94.6℃
- pH
- 1.7
- Flow type
- 掘削自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2023-07-25
- Analyst organization
- 一般社団法人 群馬県薬剤師会(環境衛生試験センター)
- Registration No.
- 群馬薬第2号
Cations
- Hydrogen ion H⁺
- 19.9 mg/kg
- Sodium ion Na⁺
- 138 mg/kg
- Potassium ion K⁺
- 64.4 mg/kg
- Ammonium ion NH₄⁺
- 0.40 mg/kg
- Magnesium ion Mg²⁺
- 76.0 mg/kg
- Calcium ion Ca²⁺
- 114 mg/kg
- Aluminum ion Al³⁺
- 43.2 mg/kg
- Manganese ion Mn²⁺
- 3.6 mg/kg
- Iron(II) ion Fe²⁺
- 3.0 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Total cations
- 0.46 mg/kg
Anions
- Fluoride ion F⁻
- 25.1 mg/kg
- Chloride ion Cl⁻
- 708 mg/kg
- Sulfate ion SO₄²⁻
- 840 mg/kg
- Bromide ion Br⁻
- 4.5 mg/kg
- Hydrogen sulfate HSO₄⁻
- 565 mg/kg
- Total anions
- 2.1 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 28.5 mg/kg
- Metasilicic acid H₂SiO₃
- 528 mg/kg
- Metaboric acid HBO₂
- 21.4 mg/kg
- Total undissociated
- 0.58 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 26.4 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.03 mg/kg
Totals
- Total dissolved substances
- 3.2 mg/kg
- Component total
- 3.2 mg/kg
- Evaporation residue
- 2.5 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Chronic pain or stiffness in muscles and joints (chronic phase of rheumatoid arthritis, osteoarthritis, low back pain, neuralgia, frozen shoulder, bruises, sprains, etc.), Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction (stomach heaviness, intestinal gas, etc.), High blood pressure (mild), Dyslipidemia, Mild asthma or emphysema, Hemorrhoid pain, Autonomic instability, Stress-related symptoms (insomnia, etc.), Post-illness recovery, Fatigue recovery, Health promotion, Atopic dermatitis, Psoriasis vulgaris, Impaired glucose tolerance (diabetes), Pyoderma, Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma
- Contraindications
- Active stages of illness (especially with fever), active tuberculosis, advanced malignant tumors or severe anemia with significant physical weakness, severe heart or lung disease causing shortness of breath with slight movement, severe kidney disease with swelling, gastrointestinal bleeding, visible bleeding, acute exacerbation of chronic illness, sensitive skin or mucous membranes, dry skin in the elderly
Drinking
- Drinkability
- Not drinkable