Gokuraku Gensen
Analysis VerifiedGokuraku Gensen is a source for the iconic "Kinsen" (gold spring) of Arima Onsen, one of Japan's three ancient hot springs. It was once called "Negai no Yu" (Spring of Wishes) and its history is tied to Toyotomi Hideyoshi, who had its waters channeled to his private bathhouse. The rich water, which turns a reddish-brown when exposed to air, has been cherished by therapeutic bathers for centuries. Its high salt concentration envelops the skin, providing long-lasting warmth after bathing. Steeping in this historic spring, you can feel the deep warmth that once soothed samurai warlords, offering a true escape from daily fatigue.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Undissociated boric acid with antibacterial action that keeps the skin surface clean.
Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").
Salt forms a thin film on the skin, retaining heat after bathing. Helps with poor circulation.
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 hypertonic spring with a very high temperature of 98.1°C and a high concentration of salt and iron. If offered as a free-flowing source without dilution, start by acclimating your body with a footbath. Avoid long soaks and take breaks. The water may feel intense on the skin.
As a hypertonic spring with about 1.5 times the salt concentration of seawater, it forms a thin veil on the skin, offering excellent "restorative warmth" that prevents post-bath chills. Its abundant iron content supports "rejuvenation," helping to alleviate fatigue. With a neutral pH of 6.94, it is cherished as a form of "balneotherapy" that gently envelops the skin while deeply warming the body from its core.
Due to the very high salt concentration and temperature, individuals with high blood pressure or heart conditions should avoid prolonged bathing. The rich mineral content may require sensitive skin types to rinse with fresh water after bathing.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Gokuraku Gensen
- Spring type
- Sodium Chloride Hot Spring
- Old spring type name
- 含鉄・ナトリウム-塩化物強塩高温泉
- Source temperature
- 98.1℃
- pH
- 6.94
- Flow rate
- 66 L/min
- Flow type
- 掘削・自噴
- Osmotic pressure
- 高張性
Analysis Document
- Analysis date
- 2020-01-10
- Analyst organization
- 公益財団法人 中央温泉研究所
- Registration No.
- 第3753号
Cations
- Sodium ion Na⁺
- 4336 mg/kg
- Potassium ion K⁺
- 813 mg/kg
- Ammonium ion NH₄⁺
- 2.0 mg/kg
- Magnesium ion Mg²⁺
- 5.0 mg/kg
- Calcium ion Ca²⁺
- 443 mg/kg
- Aluminum ion Al³⁺
- 0.20 mg/kg
- Manganese ion Mn²⁺
- 2.5 mg/kg
- Iron(II) ion Fe²⁺
- 11.4 mg/kg
- Zinc ion Zn²⁺
- 1.4 mg/kg
- Lead ion Pb²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- 0.00 mg/kg
- Cadmium ion Cd²⁺
- 0.00 mg/kg
- Total cations
- 5.6 mg/kg
Anions
- Fluoride ion F⁻
- 1.7 mg/kg
- Chloride ion Cl⁻
- 7930 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.50 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 17.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 630 mg/kg
- Carbonate ion CO₃²⁻
- 0.30 mg/kg
- Bromide ion Br⁻
- 14.8 mg/kg
- Iodide ion I⁻
- 1.9 mg/kg
- Total anions
- 8.6 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 99.9 mg/kg
- Metaboric acid HBO₂
- 130 mg/kg
- Total undissociated
- 0.23 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 104 mg/kg
- Free hydrogen sulfide H₂S
- 0.40 mg/kg
- Total dissolved gas
- 0.10 mg/kg
Trace Components
- Radon Rn
- 0
Totals
- Total dissolved substances
- 14.4 mg/kg
- Component total
- 14.5 mg/kg
- Evaporation residue
- 14.2 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma, Cuts and grazes, Burns, Chronic skin diseases, Frail children, Chronic women's diseases, Menstrual disorders, Chronic pain or stiffness in muscles and joints, Muscle stiffness due to motor paralysis, Poor circulation, Peripheral circulatory failure, Gastrointestinal dysfunction, High blood pressure (mild), Impaired glucose tolerance (diabetes), Dyslipidemia, Hyperuricemia (gout), Iron-deficiency anemia, Autonomic instability, Insomnia, Depression
- 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 swelling, Gastrointestinal bleeding, Visible bleeding, Acute exacerbation of chronic illness
Drinking
- Drinkability
- Not drinkable
