Hanayama Onsen
Analysis UnverifiedSaid to date back to the Heian period and linked to the monk Gyoki, this sacred spring once welcomed pilgrims bound for Kumano. Its natural flow ceased for centuries until a 1965 boring struck water at 501 m, and today its calcium- and magnesium-rich water builds thick mineral crusts around every bath.
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.
A "beauty spring" that gently emulsifies dead skin cells, leaving skin smooth after bathing.
Easily absorbed through the skin, helping to relax muscle stiffness during bathing — a transdermal nutrient unique to hot springs.
Bubbles cling to the skin and dilate blood vessels — the "heart spring." Warms the body even at lukewarm temperatures.
Salinity comparable to seawater. The salt film traps heat for outstanding warmth ("hot bath spring").
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.
At 25.2°C the source is cool, so alternate it with heated water for contrast bathing. Bubbles cling best when the water is calm. Being strongly hypertonic, keep sessions moderate and avoid splashing it into your eyes.
With 2,631 mg/kg of free carbon dioxide, the water is thought to widen blood vessels and boost circulation, so even the cool source leaves a lingering inner warmth that supports rejuvenation, while 8,810 mg/kg of chloride helps seal in heat for deep relaxation afterward.
Strongly hypertonic and irritating to the eyes. Drinking more than 250 mL a day may cause diarrhea, according to the posted drinking guidance.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Hanayama Onsen
- Spring type
- Carbon dioxide-containing Iron (II,III) Calcium-Magnesium Chloride Hot Spring
- Old spring type name
- 含炭酸・鉄－塩化土類－食塩泉
- Source temperature
- 25.2℃
- pH
- 6.3
- Flow rate
- 128 L/min
- Flow type
- 掘削自噴
- Osmotic pressure
- 高張性
Analysis Document
- Analysis date
- 2017-11-28
- Analyst organization
- 日本水処理工業株式会社
- Registration No.
- 大阪府第5号
Cations
- Hydrogen ion H⁺
- < 0.1 mg/kg
- Lithium ion Li⁺
- < 0.1 mg/kg
- Sodium ion Na⁺
- 1135 mg/kg
- Potassium ion K⁺
- 20.3 mg/kg
- Ammonium ion NH₄⁺
- 1.5 mg/kg
- Magnesium ion Mg²⁺
- 1191 mg/kg
- Calcium ion Ca²⁺
- 2022 mg/kg
- Aluminum ion Al³⁺
- < 0.1 mg/kg
- Manganese ion Mn²⁺
- 0.70 mg/kg
- Iron(II) ion Fe²⁺
- 50.0 mg/kg
- Iron(III) ion Fe³⁺
- < 0.1 mg/kg
- Zinc ion Zn²⁺
- 0.03 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 15.7 mg/kg
- Barium ion Ba²⁺
- 0.50 mg/kg
- Copper ion Cu²⁺
- 0.03 mg/kg
- Cadmium ion Cd²⁺
- < 0.01 mg/kg
- Total cations
- 4.4 mg/kg
Anions
- Fluoride ion F⁻
- < 0.1 mg/kg
- Chloride ion Cl⁻
- 8810 mg/kg
- Hydrogen sulfide ion HS⁻
- < 0.1 mg/kg
- Thiosulfate ion S₂O₃²⁻
- < 0.1 mg/kg
- Sulfate ion SO₄²⁻
- 3.1 mg/kg
- Bicarbonate ion HCO₃⁻
- 3301 mg/kg
- Carbonate ion CO₃²⁻
- < 0.1 mg/kg
- Bromide ion Br⁻
- 22.6 mg/kg
- Iodide ion I⁻
- < 0.1 mg/kg
- Nitrite ion NO₂⁻
- < 0.1 mg/kg
- Nitrate ion NO₃⁻
- 0.20 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.20 mg/kg
- Total anions
- 12.1 mg/kg
Undissociated Components
- Arsenious acid HAsO₂
- < 0.1 mg/kg
- Metasilicic acid H₂SiO₃
- 153 mg/kg
- Metaboric acid HBO₂
- 389 mg/kg
- Total undissociated
- 0.54 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 2631 mg/kg
- Free hydrogen sulfide H₂S
- < 0.1 mg/kg
- Total dissolved gas
- 2.6 mg/kg
Totals
- Total dissolved substances
- 17.1 mg/kg
- Component total
- 19.8 mg/kg
- Evaporation residue
- 19.6 mg/kg
Usage
- Heating
- No
- Dilution
- No
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Cuts and grazes, Peripheral circulatory failure, Poor circulation, Autonomic instability, Depression, Xeroderma
- General indications
- High blood pressure (mild), Rheumatoid arthritis, 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