Kiga Onsen (source used at Oukyuan Betei Rin)
Analysis UnverifiedKiga Onsen has long been counted among the historic Seven Hot Springs of Hakone, rising in the quiet Miyagino hills along the Haya River gorge. Said to have been presented to the Tokugawa shoguns in the Edo period, the water emerges clear at 63.9°C with a faint salty taste. Its salt wraps the skin and holds in warmth, while the weakly alkaline water feels soft. It suits grown-up travelers who want to sink quietly into a storied spring to the sound of the river.
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.
- Chloride (salt)332 mg/kg
- Feel
- Tastes salty; the warmth lasts after you get out.
- Said to
- Salt is said to form a film on the skin that keeps in heat and moisture. Bathing indications include cuts, poor circulation and dry skin.
- Note
- May sting cuts. Strong salty water can tire you—avoid long soaks.
- Alkaline (pH)pH 8.5
- Feel
- Feels slippery and silky on the skin.
- Said to
- Said to remove old skin cells and excess sebum.
- Note
- Skin can dry out afterwards—moisturize after bathing.
- Metasilicic acid148 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature63.9℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
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.
Chloride springs keep you warm long after bathing, so limit soaks to about 10 minutes. Skip the rinse afterward to leave the salt film on your skin, and ease in slowly from your feet if the water feels hot.
With 332 mg/kg of chloride, this salt spring leaves a thin film on the skin traditionally associated with restorative warmth that lingers after bathing, and its 63.9°C water may help relieve pain from chill and stiffness.
Its strong warming effect can cause light-headedness, so drink water often. It may sting cuts, and keep baths short if you feel unwell.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Kiga Onsen (source used at Oukyuan Betei Rin)
- Spring type
- Sodium Chloride Hot Spring
- Old spring type name
- 純弱食塩泉
- Source temperature
- 63.9℃
- pH
- 8.5
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2014-10-03
- Analyst organization
- 神奈川県温泉地学研究所
- Registration No.
- 神奈川県知事登録第1号
Cations
- Lithium ion Li⁺
- 0.27 mg/kg
- Sodium ion Na⁺
- 261 mg/kg
- Potassium ion K⁺
- 21.0 mg/kg
- Magnesium ion Mg²⁺
- 1.9 mg/kg
- Calcium ion Ca²⁺
- 21.9 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.07 mg/kg
- Iron(II) ion Fe²⁺
- 0.03 mg/kg
- Zinc ion Zn²⁺
- 0.02 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Strontium ion Sr²⁺
- 0.10 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 306 mg/kg
Anions
- Fluoride ion F⁻
- 0.08 mg/kg
- Chloride ion Cl⁻
- 332 mg/kg
- Sulfate ion SO₄²⁻
- 60.3 mg/kg
- Bicarbonate ion HCO₃⁻
- 147 mg/kg
- Carbonate ion CO₃²⁻
- 3.5 mg/kg
- Bromide ion Br⁻
- 0.57 mg/kg
- Nitrate ion NO₃⁻
- 0.00 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 9.3 mg/kg
- Metaborate ion BO₂⁻
- 2.9 mg/kg
- Total anions
- 556 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 148 mg/kg
- Metaboric acid HBO₂
- 15.0 mg/kg
- Total undissociated
- 163 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.76 mg/kg
- Total dissolved gas
- 0.76 mg/kg
Totals
- Total dissolved substances
- 1025 mg/kg
- Component total
- 1026 mg/kg
- Evaporation residue
- 913 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, 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)
Drinking
- Drinkability
- Not drinkable
