Beppu Onsen Hotel Koraku
Analysis VerifiedGushing in the Kitahama area, the heart of the Beppu Onsen region renowned for Japan's largest hot spring output, this private source has a rich history. The area flourished as an entertainment district for therapeutic bathers since a regular sea route to Osaka was established in the Meiji era. The Beppu Onsen Hotel Koraku source is uniquely characterized by its dual nature as both a bicarbonate and a chloride spring. Steeping in its waters gently exfoliates the skin while a fine veil of salt locks in moisture, leaving you with a silky feel and a restorative warmth that lingers long after your bath.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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.
Transdermal absorption gently supports skin hydration and muscle relaxation.
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 spring temperature is a high 50.6°C, so acclimate your body with "kake-yu" (scooping and pouring water on yourself) before entering. The bicarbonate spring smooths the skin while the chloride spring prevents post-bath chills. Avoid long soaks. To best experience the moisturizing effects, gently pat your skin dry without rinsing off.
A prime example of a "Bijin-no-yu" (beauty spring), it contains a rich 249.0 mg/kg of metasilicic acid. This component is known to support skin metabolism, acting like a natural moisturizer for silky skin. With 253.0 mg/kg of chloride ions, it also creates a salt veil on the skin, providing restorative warmth that prevents post-bath chills. It's the perfect bath for a day when you want to soothe fatigue and aim for rejuvenation.
Due to the high temperature, be cautious of overheating. Those with high blood pressure or heart conditions should avoid prolonged bathing. Ensure you stay well-hydrated before and after your bath.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Beppu Onsen Hotel Koraku
- Spring type
- Sodium-Magnesium-Calcium Bicarbonate and Chloride Hot Spring
- Old spring type name
- 含塩化土類-重曹泉
- Source temperature
- 50.6℃
- pH
- 7.4
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2024-12-05
- 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⁺
- 0.90 mg/kg
- Sodium ion Na⁺
- 205 mg/kg
- Potassium ion K⁺
- 33.6 mg/kg
- Ammonium ion NH₄⁺
- 0.60 mg/kg
- Magnesium ion Mg²⁺
- 55.9 mg/kg
- Calcium ion Ca²⁺
- 74.5 mg/kg
- Manganese ion Mn²⁺
- 0.40 mg/kg
- Iron(II) ion Fe²⁺
- 0.30 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.40 mg/kg
- Barium ion Ba²⁺
- 0.30 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.37 mg/kg
Anions
- Fluoride ion F⁻
- 0.00 mg/kg
- Chloride ion Cl⁻
- 253 mg/kg
- Sulfate ion SO₄²⁻
- 39.9 mg/kg
- Bicarbonate ion HCO₃⁻
- 644 mg/kg
- Bromide ion Br⁻
- 0.80 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.40 mg/kg
- Total anions
- 0.94 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
- 249 mg/kg
- Metaboric acid HBO₂
- 4.1 mg/kg
- Total undissociated
- 0.25 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 26.8 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.03 mg/kg
Trace Components
- Radon Rn
- 0
Totals
- Total dissolved substances
- 1.6 mg/kg
- Component total
- 1.6 mg/kg
- Evaporation residue
- 1.1 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Xeroderma, Depression, Chronic pain or stiffness in muscles and joints (chronic phase of conditions such as rheumatoid arthritis, osteoarthritis, lower back pain, neuralgia, frozen shoulder, bruises, sprains), muscle stiffness due to motor paralysis, poor circulation, gastrointestinal dysfunction (stomach heaviness, intestinal gas, etc.), high blood pressure (mild), impaired glucose tolerance (diabetes), mild dyslipidemia, mild asthma or emphysema, hemorrhoid pain, autonomic instability, stress-related symptoms (insomnia, depression, etc.), post-illness recovery, fatigue recovery, health promotion, cuts and grazes, 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), Active stages of illness (especially with fever), active tuberculosis, advanced malignant tumors or severe anemia causing significant physical decline, severe heart or lung disease causing shortness of breath with slight movement, severe kidney disease with edema, gastrointestinal bleeding, visible bleeding, acute exacerbation of a chronic illness
Drinking
- Drinkability
- Not drinkable
