Beppu Onsen Hoyoland Source
Analysis UnverifiedThis source rises in Konya Jigoku, a steaming "hell" of Myoban Onsen, one of the Beppu Hatto hot spring areas, where sulfur-rich fumaroles drift over the ground. With pH 2.9 and abundant sulfate, the bluish milky water turns grey in shadow and leaves a crisp, tightening touch on the skin. The scent of sulfur lingers long after bathing, making it a favorite for travelers who love cloudy, characterful waters and a refreshing soak.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
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.
At pH 2.9 the water can sting sensitive skin, so start with 5 to 10 minutes and rest between soaks. Rinse lightly with fresh water afterward and remove metal jewelry, which may tarnish.
With pH 2.9 and 206 mg/kg of sulfate, this acidic water carries the vigor of traditional toji bathing. It is often enjoyed as balneotherapy and is traditionally associated with immune system stimulation, ideal for days when you want to feel refreshed.
The strong acidity may irritate skin and mucous membranes; people with sensitive skin should avoid long soaks and keep the water away from the eyes.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Beppu Onsen Hoyoland Source
- Spring type
- Simple Acidic Spring
- Old spring type name
- 単純酸性泉
- Source temperature
- 49.7℃
- pH
- 2.9
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2016-12-27
- Analyst organization
- 公益社団法人大分県薬剤師会 検査センター
- Registration No.
- 大分県第3号
Cations
- Hydrogen ion H⁺
- 1.3 mg/kg
- Sodium ion Na⁺
- 14.4 mg/kg
- Potassium ion K⁺
- 4.9 mg/kg
- Ammonium ion NH₄⁺
- 3.8 mg/kg
- Magnesium ion Mg²⁺
- 2.6 mg/kg
- Calcium ion Ca²⁺
- 28.5 mg/kg
- Aluminum ion Al³⁺
- 6.3 mg/kg
- Manganese ion Mn²⁺
- 0.20 mg/kg
- Iron(II) ion Fe²⁺
- 4.6 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Copper ion Cu²⁺
- < 0.05 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 0.07 mg/kg
Anions
- Fluoride ion F⁻
- 0.20 mg/kg
- Chloride ion Cl⁻
- 13.7 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.10 mg/kg
- Sulfate ion SO₄²⁻
- 206 mg/kg
- Hydrogen sulfate HSO₄⁻
- 8.8 mg/kg
- Total anions
- 0.23 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 91.5 mg/kg
- Metaboric acid HBO₂
- 0.00 mg/kg
- Total undissociated
- 0.09 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 40.0 mg/kg
- Free hydrogen sulfide H₂S
- 0.30 mg/kg
- Total dissolved gas
- 0.04 mg/kg
Trace Components
- Radon Rn
- < 7.4 Bq/kg
Totals
- Total dissolved substances
- 0.39 mg/kg
- Component total
- 0.43 mg/kg
- Evaporation residue
- 0.41 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Epidermal suppuration, Impaired glucose tolerance (diabetes)
- 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), Sensitive skin or mucous membranes, eye conditions (acidic springs)
Drinking
- Drinkability
- Not drinkable
