Tenku no Daichi Kuju Kogen Hotel
Analysis VerifiedPumped from 1,000 meters beneath the Kuju Highlands in Aso-Kuju National Park, the Tenku no Daichi Kuju Kogen Hotel source is a true all-star spring, combining the properties of chloride, sulfate, and bicarbonate waters. Rich in metasilicic acid, a natural moisturizer, it leaves skin feeling smooth during the bath and wonderfully soft afterward. It's perfect for days when you want to deeply soothe body and soul while gazing at the majestic nature of the Kuju mountain range and Mount Aso.
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.
A "beauty spring" that gently emulsifies dead skin cells, leaving skin smooth after bathing.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
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.
With a high temperature of 51.5°C, it's best to take short, repeated dips rather than one long soak. The chloride components create a warming veil on the skin; for best results, gently pat dry after bathing without rinsing to retain the heat and moisturizing benefits.
With 1550 mg/kg of chloride ions creating a fine veil on the skin, this spring offers restorative warmth that lasts long after your bath. Additionally, 198.0 mg/kg of metasilicic acid and bicarbonate ions help to gently exfoliate, promoting silky skin. It's a multi-faceted spring ideal for those concerned with poor circulation or dry skin.
Due to the high temperature, individuals with high blood pressure or heart conditions should avoid sudden immersion and prolonged bathing. This water is not for drinking. If you feel unwell, exit the bath immediately.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Tenku no Daichi Kuju Kogen Hotel
- Spring type
- Sodium Chloride, Sulfate and Bicarbonate Hot Spring
- Old spring type name
- 含芒硝 重曹食塩泉
- Source temperature
- 51.5℃
- pH
- 6.8
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2021-09-21
- Analyst organization
- 公益社団法人大分県薬剤師会
- Registration No.
- 大分県第3号
Cations
- Lithium ion Li⁺
- 0.60 mg/kg
- Sodium ion Na⁺
- 1850 mg/kg
- Potassium ion K⁺
- 73.2 mg/kg
- Ammonium ion NH₄⁺
- 1.6 mg/kg
- Magnesium ion Mg²⁺
- 45.3 mg/kg
- Calcium ion Ca²⁺
- 50.1 mg/kg
- Iron(II) ion Fe²⁺
- 5.1 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 1.6 mg/kg
- Barium ion Ba²⁺
- 0.20 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 2.0 mg/kg
Anions
- Fluoride ion F⁻
- 0.40 mg/kg
- Chloride ion Cl⁻
- 1550 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.20 mg/kg
- Sulfate ion SO₄²⁻
- 1120 mg/kg
- Bicarbonate ion HCO₃⁻
- 1190 mg/kg
- Bromide ion Br⁻
- 4.0 mg/kg
- Iodide ion I⁻
- 0.20 mg/kg
- Total anions
- 3.9 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
- 198 mg/kg
- Metaboric acid HBO₂
- 44.6 mg/kg
- Total undissociated
- 0.24 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 205 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.20 mg/kg
Trace Components
- Radon Rn
- 0 Bq/kg
Totals
- Total dissolved substances
- 6.1 mg/kg
- Component total
- 6.3 mg/kg
- Evaporation residue
- 5.5 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma, Rheumatoid arthritis, Osteoarthritis, Low back pain, Neuralgia, Frozen shoulder, Bruises, Sprains, Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction, High blood pressure (mild), Impaired glucose tolerance (diabetes), Dyslipidemia, Asthma, Pulmonary emphysema, Hemorrhoids, Autonomic instability, Stress-related symptoms (insomnia, depression, etc.), Convalescence, Fatigue recovery, Health promotion, Cuts and grazes, Peripheral circulatory failure, Poor circulation, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Autonomic instability, Insomnia, 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), As per separate table
Drinking
- Drinkability
- Not drinkable
