Okamotoya Ryokan Gensen
Analysis UnverifiedMyoban Onsen prospered in the Edo period through alum production and still keeps rows of thatched huts where yunohana sulfur flowers are made. Here the Okamotoya Ryokan source gushes naturally at 74.4°C in Myoban 3-kumi; colorless as it emerges, it turns a milky, bluish white once it meets the air in the bath. Its acidity gently loosens old skin cells, leaving a soft, light feeling afterward, and it suits anyone who wishes to steep in dense sulfur water amid mountain steam.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
The source of the distinctive sulfur smell. Dilates blood vessels via skin and inhalation to strongly boost circulation.
A natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
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.
As a pH 2.6 acidic spring containing hydrogen sulfide, it is best enjoyed in soaks of about five to ten minutes with rests in between. Those with sensitive skin should rinse with fresh water afterward, and silver jewelry should be removed to prevent tarnishing.
With pH 2.6 acidity and 9.0 mg/kg of free hydrogen sulfide, this sulfur spring is traditionally associated with immune system stimulation. Its acidity and 153.0 mg/kg of metasilicic acid loosen old skin cells toward silky skin, suiting days when you wish to refresh your skin or care for your body.
Avoid long soaks in this acidic sulfur spring, take care if your skin or mucous membranes are sensitive, and mind hydrogen sulfide in poorly ventilated spaces.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Okamotoya Ryokan Gensen
- Spring type
- Acidic Sulfur-containing Simple Hot Spring (hydrogen sulfide type)
- Old spring type name
- 酸性単純硫化水素泉
- Source temperature
- 74.4℃
- pH
- 2.6
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2015-06-22
- Analyst organization
- 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⁺
- 2.5 mg/kg
- Sodium ion Na⁺
- 20.7 mg/kg
- Potassium ion K⁺
- 5.1 mg/kg
- Magnesium ion Mg²⁺
- 8.3 mg/kg
- Calcium ion Ca²⁺
- 20.2 mg/kg
- Aluminum ion Al³⁺
- 4.3 mg/kg
- Manganese ion Mn²⁺
- 0.70 mg/kg
- Iron(II) ion Fe²⁺
- 2.4 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.20 mg/kg
- Copper ion Cu²⁺
- < 0.05 mg/kg
- Cadmium ion Cd²⁺
- < 0.001 mg/kg
- Total cations
- 0.06 mg/kg
Anions
- Fluoride ion F⁻
- 0.20 mg/kg
- Chloride ion Cl⁻
- 3.3 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.40 mg/kg
- Sulfate ion SO₄²⁻
- 254 mg/kg
- Hydrogen sulfate HSO₄⁻
- 21.4 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.50 mg/kg
- Total anions
- 0.28 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.10 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 153 mg/kg
- Metaboric acid HBO₂
- 0.00 mg/kg
- Total undissociated
- 0.15 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 9.7 mg/kg
- Free hydrogen sulfide H₂S
- 9.0 mg/kg
- Total dissolved gas
- 0.02 mg/kg
Trace Components
- Radon Rn
- < 7.4 Bq/kg
Totals
- Total dissolved substances
- 0.50 mg/kg
- Component total
- 0.52 mg/kg
- Evaporation residue
- 0.49 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Epidermal suppuration, Impaired glucose tolerance (diabetes), Chronic eczema, Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, 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), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable