Owakudani Onsen (No. 2 & 3 Line Blend)
Analysis VerifiedThis unique created hot spring utilizes the fumaroles of Owakudani, which were formed by volcanic activity approximately 3000 years ago. In the early Showa period, Hakone Onsen Kyokyu Co., Ltd. developed this source to supply hot water to areas like Sengokuhara and Gora. The water, created by mixing volcanic gas and water, offers a distinct, tingling, and tightening sensation upon contact with the skin. The powerful energy from the earth delivers restorative warmth deep into the body, a warmth that lingers long after your bath. It is ideal for those seeking deep relaxation and rejuvenation, wishing to refresh their mind and body.
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.
The aroma typical of sulfur springs, with circulatory and antibacterial effects.
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.
This is a very strong acidic spring with a pH of 2.1. If you have weak or sensitive skin, avoid long baths and rinse off with a shower afterward. Be careful not to get it in your eyes, and remove any jewelry before bathing.
With a pH of 2.1, this is one of Japan's most acidic springs, and its sterilizing properties have long been used for balneotherapy, especially for skin conditions. Rich in sulfate and chloride ions, it may also relieve pain and provides restorative warmth. Containing 157 mg/kg of metasilicic acid, it also supports those seeking silky skin, offering a complex therapeutic experience.
Due to its high acidity, caution is advised for those with sensitive skin or mucous membranes. It may worsen conditions like atopic dermatitis or xeroderma. Not suitable for drinking.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Owakudani Onsen (No. 2 & 3 Line Blend)
- Spring type
- Acidic Calcium Sulfate and Chloride Hot Spring
- Old spring type name
- 酸性－含塩化土類－石膏泉
- Source temperature
- 60.6℃
- pH
- 2.1
- Flow type
- 造成温泉
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2018-09-28
- Analyst organization
- 神奈川県温泉地学研究所
- Registration No.
- 第1号
Cations
- Hydrogen ion H⁺
- 8.0 mg/kg
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 40.5 mg/kg
- Potassium ion K⁺
- 3.2 mg/kg
- Ammonium ion NH₄⁺
- 0.22 mg/kg
- Magnesium ion Mg²⁺
- 34.7 mg/kg
- Calcium ion Ca²⁺
- 90.6 mg/kg
- Aluminum ion Al³⁺
- 7.5 mg/kg
- Manganese ion Mn²⁺
- 1.3 mg/kg
- Iron(II) ion Fe²⁺
- 13.2 mg/kg
- Zinc ion Zn²⁺
- 0.04 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.17 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 0.20 mg/kg
Anions
- Fluoride ion F⁻
- 0.80 mg/kg
- Chloride ion Cl⁻
- 342 mg/kg
- Sulfate ion SO₄²⁻
- 443 mg/kg
- Bicarbonate ion HCO₃⁻
- 0.00 mg/kg
- Bromide ion Br⁻
- 0.14 mg/kg
- Hydrogen sulfate HSO₄⁻
- 118 mg/kg
- Nitrate ion NO₃⁻
- 0.49 mg/kg
- Total anions
- 0.90 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 2.4 mg/kg
- Metasilicic acid H₂SiO₃
- 157 mg/kg
- Metaboric acid HBO₂
- 14.2 mg/kg
- Total undissociated
- 0.17 mg/kg
Dissolved Gas
- Free hydrogen sulfide H₂S
- 2.4 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Component total
- 1.3 mg/kg
- Evaporation residue
- 1.2 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, bruises, sprains, etc. in chronic phase), Muscle stiffness due to motor paralysis, Poor circulation, Gastrointestinal dysfunction (stomach heaviness, bloating, etc.), High blood pressure (mild), Impaired glucose tolerance (diabetes), Dyslipidemia (mild), 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, Atopic dermatitis, Psoriasis vulgaris
- General indications
- People with sensitive skin or mucous membranes, dry skin in the elderly
- Contraindications
- 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 swelling, Gastrointestinal bleeding, Visible bleeding, Acute exacerbation of chronic illness. For acidic springs (pH below 3): People with sensitive skin or mucous membranes, dry skin in the elderly.
Drinking
- Drinkability
- Not drinkable
