Kowakien Kyokyu Onsen
Analysis VerifiedThe Kowakien Kyokyu Onsen is a steam-generated spring developed since 1949 to supply the Hakone Kowakien resort area. It utilizes geothermal heat from former fumarolic activity along the Kurumazawa stream, a tributary of the Jakotsu River, blending multiple sources and natural spring water. This source is widely distributed to the various facilities of the Hakone Kowakien resort, operated by Fujita Kanko, forming the foundation of the entire resort.
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 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.
As the source temperature is high, facilities adjust it for comfortable bathing. Start by splashing water on your limbs to acclimate your body. Avoid long soaks; aim for 10-15 minute intervals with breaks in between for a relaxing experience.
With a neutral pH of 7.4, this spring offers a gentle bathing experience. The 364 mg/kg of chloride ions form a thin veil on the skin, preventing moisture loss and providing excellent restorative warmth. Additionally, a high metasilicic acid content of 121 mg/kg, known for promoting silky skin, helps to support skin turnover.
Avoid bathing during active illness, extreme exhaustion, or if you have severe heart or kidney disease. Refrain from bathing immediately after meals or after consuming alcohol.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kowakien Kyokyu Onsen
- Spring type
- Sodium Chloride Hot Spring
- Old spring type name
- 純弱食塩泉
- Source temperature
- 76.5℃
- pH
- 7.4
- Flow type
- 蒸気造成温泉
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2017-03-03
- Analyst organization
- 神奈川県温泉地学研究所
- Registration No.
- 第1号
Cations
- Lithium ion Li⁺
- 0.26 mg/kg
- Sodium ion Na⁺
- 230 mg/kg
- Potassium ion K⁺
- 21.7 mg/kg
- Magnesium ion Mg²⁺
- 7.3 mg/kg
- Calcium ion Ca²⁺
- 36.1 mg/kg
- Aluminum ion Al³⁺
- 0.06 mg/kg
- Manganese ion Mn²⁺
- 1.2 mg/kg
- Iron(II) ion Fe²⁺
- 0.31 mg/kg
- Zinc ion Zn²⁺
- 0.03 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.21 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.30 mg/kg
Anions
- Fluoride ion F⁻
- 0.26 mg/kg
- Chloride ion Cl⁻
- 364 mg/kg
- Sulfate ion SO₄²⁻
- 93.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 125 mg/kg
- Carbonate ion CO₃²⁻
- 0.27 mg/kg
- Bromide ion Br⁻
- 0.71 mg/kg
- Nitrate ion NO₃⁻
- 0.11 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.61 mg/kg
- Metaborate ion BO₂⁻
- 0.30 mg/kg
- Total anions
- 0.58 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 121 mg/kg
- Metaboric acid HBO₂
- 19.5 mg/kg
- Total undissociated
- 0.14 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 8.3 mg/kg
- Total dissolved gas
- 0.01 mg/kg
Totals
- Component total
- 1.0 mg/kg
- Evaporation residue
- 0.90 mg/kg
Usage
- Heating
- No
- Dilution
- Yes（Water is added to maintain a suitable temperature for bathing.）
- 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, chronic phase of bruises and sprains), muscle stiffness due to motor paralysis, poor circulation, gastrointestinal dysfunction (stomach heaviness, intestinal gas), high blood pressure (mild), impaired glucose tolerance (diabetes), dyslipidemia (mild), mild asthma or emphysema, hemorrhoids, autonomic instability, stress-related symptoms (insomnia, depression), post-illness recovery, fatigue recovery, health promotion, cuts and grazes, xeroderma
- General indications
- 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 light activity, severe kidney disease with swelling, gastrointestinal bleeding, visible bleeding, acute exacerbation of chronic illness
- Contraindications
- (Contraindications specific to spring quality) None applicable
Drinking
- Drinkability
- Not drinkable
