Nishinokawara Gensen (Cho-yu)
Analysis UnverifiedNishinokawara Gensen is one of Kusatsu's most celebrated springs, cherished by generations of visitors seeking the healing power of hot spring bathing. The area around Nishinokawara Park is famed for its otherworldly landscape of steaming streams, lending a dramatic atmosphere unique to Kusatsu. This spring is especially well-suited for those troubled by skin conditions or chronic fatigue, or anyone seeking a powerful escape from the stresses of modern life.
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.
Due to the strongly acidic pH of 2.04, those with sensitive skin are advised to rinse off with fresh water after bathing. First-time bathers should start with 3–5 minutes and gradually extend to 10–15 minutes as they acclimate. Since the source temperature is 53.7°C, always take a thorough pre-bath rinse, and rest for at least 30 minutes after each session.
With a pH of 2.04, a source temperature of 53.7°C, and high concentrations of sulfate (721.5 mg/kg) and chloride (416.3 mg/kg), this spring is officially indicated for skin conditions such as atopic dermatitis, chronic eczema, and psoriasis, as well as cuts, poor circulation, and cold sensitivity. It is also recognized for relieving chronic pain from rheumatoid arthritis, lower back pain, and neuralgia.
Those with sensitive skin or mucous membranes, and elderly individuals with dry skin conditions, should avoid bathing. Due to the strong acidity, people with delicate skin are advised to rinse off with fresh water after bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- 西ノ河原源泉（町有）
- Spring type
- 酸性アルミニウム－硫酸塩・塩化物温泉（低張性酸性高温泉）
- Source temperature
- 53.7℃
- pH
- 2.04
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2023-08-04
- 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⁺
- 9.6 mg/kg
- Sodium ion Na⁺
- 80.6 mg/kg
- Potassium ion K⁺
- 34.2 mg/kg
- Ammonium ion NH₄⁺
- 0.30 mg/kg
- Magnesium ion Mg²⁺
- 51.7 mg/kg
- Calcium ion Ca²⁺
- 99.8 mg/kg
- Aluminum ion Al³⁺
- 55.8 mg/kg
- Manganese ion Mn²⁺
- 2.4 mg/kg
- Iron(II) ion Fe²⁺
- 16.5 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Total cations
- 0.35 mg/kg
Anions
- Fluoride ion F⁻
- 13.6 mg/kg
- Chloride ion Cl⁻
- 416 mg/kg
- Sulfate ion SO₄²⁻
- 722 mg/kg
- Hydrogen sulfate HSO₄⁻
- 232 mg/kg
- Total anions
- 1.4 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 5.6 mg/kg
- Metasilicic acid H₂SiO₃
- 278 mg/kg
- Metaboric acid HBO₂
- 12.4 mg/kg
- Total undissociated
- 0.30 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 66.0 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.07 mg/kg
Trace Components
- Total sulfur S
- 0.89 mg/kg
Totals
- Total dissolved substances
- 2.0 mg/kg
- Component total
- 2.1 mg/kg
- Evaporation residue
- 1.8 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 (rheumatoid arthritis, osteoarthritis, low back pain, neuralgia, frozen shoulder, contusions, sprains and similar conditions in their chronic phase), muscle stiffness due to motor paralysis, gastrointestinal dysfunction (gastric distress, intestinal gas accumulation, etc.), high blood pressure (mild), dyslipidemia (mild), mild asthma or emphysema, hemorrhoids pain, autonomic instability, stress-related symptoms (sleep disorders, etc.), post-illness recovery period, fatigue recovery, health promotion. Atopic dermatitis, psoriasis vulgaris, impaired glucose tolerance (diabetes), pyogenic skin infection, chronic eczema, cuts and grazes, peripheral circulatory failure, poor circulation, depression, xeroderma.
- Contraindications
- Acute phase of illness (especially with fever), active tuberculosis, advanced malignant tumors or cases of severe physical weakness such as severe anemia, severe heart or lung disease causing shortness of breath with minimal exertion, severe kidney disease with edema, gastrointestinal bleeding, visible bleeding, acute exacerbation of chronic illness. For bathing: hypersensitivity of skin or mucous membranes, xeroderma in elderly patients.
Drinking
- Drinkability
- Not drinkable