Tamanoyu Gensen
Analysis VerifiedSince Taisho 6 (1917), the waters of Noboribetsu have embodied the cherished philosophy of being 'a warm hometown and a home of rest for travelers.' Embraced by lush greenery and traditional Japanese gardens, a gentle aroma of sulfur delicately permeates the air. This tenderly enveloping spring water warms the body to its core, and its restorative warmth lingers long after bathing. The feeling of lightness post-bath is akin to a complete rejuvenation of mind and body. It is highly recommended for those seeking deep relaxation, wishing to reflect within themselves amidst tranquil serenity.
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 natural moisturizer also used in skincare lotions. Forms a thin veil on the skin to reduce moisture loss after bathing.
The aroma typical of sulfur springs, with circulatory and antibacterial effects.
- Sulfur3.2 mg/kg
- Feel
- Smells like boiled eggs; the water may turn milky white or blue-green.
- Said to
- Said to be strongly antibacterial and to promote circulation. Bathing indications include atopic dermatitis and chronic eczema.
- Note
- With sensitive skin, rinse with fresh water after bathing. Remove silver jewelry—it tarnishes.
- Chloride (salt)3057 mg/kg
- Feel
- Tastes salty; the warmth lasts after you get out.
- Said to
- Salt is said to form a film on the skin that keeps in heat and moisture. Bathing indications include cuts, poor circulation and dry skin.
- Note
- May sting cuts. Strong salty water can tire you—avoid long soaks.
- Metasilicic acid292 mg/kg
- Feel
- Your skin may feel smoother.
- Said to
- 50 mg/kg or more is said to mark a “skin-beautifying spring”; it is also used in skincare.
- Note
- The “skin-beautifying” label is a common rule of thumb, not a legal standard.
- Source temperature82.8℃
- Feel
- The source is 42°C or hotter; the bath may be on the hot side.
- Said to
- Heat is said to boost circulation and warm the body.
- Note
- Older people and those with high blood pressure or heart conditions should avoid baths of 42°C or more. Keep soaks short.
Effects are general descriptions based on the Ministry of the Environment’s indications by spring type, not a guarantee.
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.
Given the source's exceptionally high temperature of 82.8°C, the facility carefully adjusts it to a comfortable warmth. Before entering, perform thorough pre-bath rinsing to prevent sudden blood pressure fluctuations, then immerse yourself slowly and deliberately. After bathing, apply moisturizing care to prevent skin desiccation and lock in the thermal benefits.
At neutral pH 6.4, this mineral-rich water envelops skin in a protective saline veil, preventing heat loss and cooling. The sulfur content proves particularly beneficial for those with peripheral circulatory disorders and chronic chilliness. Penetrating warmth from core to surface gently alleviates fatigue and stress-induced complaints, revitalizing body and spirit alike.
Those with sensitive skin or mucous membranes, and elderly guests prone to dry skin conditions, should refrain from bathing. When drinking, those under 15 should avoid ingestion; adhere to the daily limit of approximately 280mL.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Tamanoyu Gensen
- Spring type
- 含硫黄－ナトリウム・カルシウム－塩化物温泉（硫化水素型）
- Old spring type name
- 含塩化土類－食塩硫化水素泉
- Source temperature
- 82.8℃
- pH
- 6.4
- Flow type
- 自然湧出
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2019-03-29
- Analyst organization
- 株式会社 環境総合科学
- Registration No.
- 北海道第4号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 1271 mg/kg
- Potassium ion K⁺
- 110 mg/kg
- Ammonium ion NH₄⁺
- 1.9 mg/kg
- Magnesium ion Mg²⁺
- 25.1 mg/kg
- Calcium ion Ca²⁺
- 594 mg/kg
- Manganese ion Mn²⁺
- 1.5 mg/kg
- Iron(II) ion Fe²⁺
- 0.10 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
- 2003 mg/kg
Anions
- Fluoride ion F⁻
- 5.7 mg/kg
- Chloride ion Cl⁻
- 3057 mg/kg
- Hydroxide ion OH⁻
- 0.00 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.50 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 1.7 mg/kg
- Sulfate ion SO₄²⁻
- 88.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 95.9 mg/kg
- Carbonate ion CO₃²⁻
- 0.00 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.20 mg/kg
- Total anions
- 3249 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 292 mg/kg
- Metaboric acid HBO₂
- 204 mg/kg
- Total undissociated
- 496 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 23.2 mg/kg
- Free hydrogen sulfide H₂S
- 1.8 mg/kg
- Total dissolved gas
- 25.0 mg/kg
Totals
- Total dissolved substances
- 5748 mg/kg
- Component total
- 5773 mg/kg
- Evaporation residue
- 5509 mg/kg
Usage
- Heating
- No
- Dilution
- Yes
- Recycle / Filter
- No
- Additives
- No
- Disinfection
- No
Indications & Contraindications
- Bathing indications
- Atopic dermatitis, Plaque psoriasis, Chronic eczema, Epidermal suppuration, Cuts and grazes, Peripheral circulatory failure, Poor circulation, Depression, Xeroderma
- 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), Severe chronic dermatitis (sulphur springs)
Drinking
- Drinkability
- Not drinkable
