Ryujin Onsen Shimo-no-yu
Analysis UnverifiedRyujin Onsen is an ancient spa said to have been discovered by the ascetic En no Gyoja and opened by Kobo Daishi after a dream of the dragon king Nanda; in the Edo period it was a favored retreat of the lords of Kishu. Shimo-no-yu flows naturally beside the Hidaka River, and its bicarbonate-rich water gently lifts away old skin, leaving a silky feel. Counted among Japan's three great beauty springs, it has long welcomed travelers seeking smoother skin.
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.
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.
Bicarbonate springs cleanse away skin oils, so moisturize after bathing. At a gentle pH 7.8, take your time soaking to enjoy the smooth feel on your skin.
With 893.3 mg/kg of bicarbonate in a weakly alkaline base, this water may help smooth the skin's surface toward silky skin. It also carries 65.2 mg/kg of metasilicic acid, and a leisurely soak offers a balneotherapy moment that eases travel fatigue.
Avoid bathing with acute illness or fever, serious heart disease, or in early or late pregnancy. Do not bathe after drinking or right before or after meals.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Ryujin Onsen Shimo-no-yu
- Spring type
- Sodium Bicarbonate Hot Spring
- Source temperature
- 46℃
- pH
- 7.8
- Flow rate
- 68 L/min
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2008-07-15
- Analyst organization
- 和歌山県環境衛生研究センター
- Registration No.
- 第1号
Cations
- Hydrogen ion H⁺
- < 0.1 mg/kg
- Sodium ion Na⁺
- 361 mg/kg
- Potassium ion K⁺
- 8.6 mg/kg
- Magnesium ion Mg²⁺
- 0.80 mg/kg
- Calcium ion Ca²⁺
- 6.9 mg/kg
- Aluminum ion Al³⁺
- < 0.1 mg/kg
- Manganese ion Mn²⁺
- < 0.1 mg/kg
- Iron(II) ion Fe²⁺
- < 0.1 mg/kg
- Lead ion Pb²⁺
- < 0.05 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Cadmium ion Cd²⁺
- < 0.05 mg/kg
- Total cations
- 0.38 mg/kg
Anions
- Fluoride ion F⁻
- 4.8 mg/kg
- Chloride ion Cl⁻
- 32.0 mg/kg
- Hydroxide ion OH⁻
- < 0.1 mg/kg
- Hydrogen sulfide ion HS⁻
- < 0.1 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.1 mg/kg
- Sulfate ion SO₄²⁻
- 2.9 mg/kg
- Bicarbonate ion HCO₃⁻
- 893 mg/kg
- Carbonate ion CO₃²⁻
- 4.2 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- < 0.1 mg/kg
- Metaborate ion BO₂⁻
- < 0.1 mg/kg
- Total anions
- 0.94 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 65.2 mg/kg
- Metaboric acid HBO₂
- 11.0 mg/kg
- Total undissociated
- 0.08 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- < 0.1 mg/kg
- Free hydrogen sulfide H₂S
- < 0.1 mg/kg
Totals
- Total dissolved substances
- 1.4 mg/kg
- Component total
- 1.4 mg/kg
- Evaporation residue
- 1.4 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Autonomic instability, Insomnia, Depression, 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