Kurume Onsen
Analysis UnverifiedKurume Onsen rises in Yunosaka, on the eastern edge of Kurume overlooking the Chikugo Plain, where drilling in the late Showa era struck a spring that flows by its own pressure. It still gushes 94 liters a minute at over 50°C without pumps. The alkaline water carries a faint scent of sulfur and leaves a squeaky-clean, smooth feel, an unpretentious beauty bath right on the city's doorstep.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Mild antibacterial action keeps the skin clean. Trace transdermal absorption supports tooth and bone health.
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.
At pH 9.5 the water softens old skin cells, so skip hard scrubbing and simply stroke your skin in the bath. Moisturize soon after, and since the source exceeds 50°C, keep hot-tub soaks short and linger in the cooler pools.
Its pH 9.5 alkalinity and 53 mg/kg of carbonate soften the skin's surface for silky skin, while the sulfur compounds are traditionally associated with immune system stimulation.
The source exceeds 50°C, so avoid long soaks in hot pools and drink water often. Alkaline water strips sebum, so dry skin needs moisturizing. Those in acute illness or with serious heart or respiratory conditions should consult a doctor.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kurume Onsen
- Spring type
- Alkaline Simple Sulfur Hot Spring
- Source temperature
- 50.4℃
- pH
- 9.5
- Flow rate
- 94 L/min
- Flow type
- 自噴
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-06-10
- Analyst organization
- 株式会社CRC食品環境衛生研究所
- Registration No.
- 福岡県第6号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 80.5 mg/kg
- Potassium ion K⁺
- 1.1 mg/kg
- Ammonium ion NH₄⁺
- 1.1 mg/kg
- Magnesium ion Mg²⁺
- 0.00 mg/kg
- Calcium ion Ca²⁺
- 0.00 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.00 mg/kg
- Barium ion Ba²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Total cations
- 0.08 mg/kg
Anions
- Fluoride ion F⁻
- 8.4 mg/kg
- Chloride ion Cl⁻
- 3.6 mg/kg
- Hydroxide ion OH⁻
- 0.50 mg/kg
- Hydrogen sulfide ion HS⁻
- 1.2 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 3.3 mg/kg
- Sulfate ion SO₄²⁻
- 1.1 mg/kg
- Bicarbonate ion HCO₃⁻
- 88.0 mg/kg
- Carbonate ion CO₃²⁻
- 53.0 mg/kg
- Bromide ion Br⁻
- 0.00 mg/kg
- Iodide ion I⁻
- 0.00 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Nitrite ion NO₂⁻
- 0.00 mg/kg
- Nitrate ion NO₃⁻
- 0.00 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.00 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Arsenite ion AsO₂⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.00 mg/kg
- Metaborate ion BO₂⁻
- 1.0 mg/kg
- Total anions
- 0.16 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 61.9 mg/kg
- Metaboric acid HBO₂
- 0.00 mg/kg
- Total undissociated
- 0.06 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Trace Components
- Radon Rn
- < 1.02 mE/kg
Totals
- Total dissolved substances
- 0.30 mg/kg
- Component total
- 0.30 mg/kg
- Evaporation residue
- 0.24 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration
- General indications
- High blood pressure (mild), Rheumatoid arthritis, 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), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable
