Ryusenji Spring
Analysis UnverifiedRyusenji Hot Spring emerges from deep beneath Tokyo's Hachioji district, nestling quietly in the verdant Kataura neighborhood where urban convenience meets unspoiled nature. Long cherished as a sanctuary where residents unburden themselves from daily fatigue, this gentle spring has become a beloved refuge for modern souls seeking respite from the relentless demands of work and stress. Ideal for those yearning to release accumulated tension and restore inner calm, Ryusenji offers a serene invitation to pause and breathe.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
A trace component with gentle antibacterial and anti-inflammatory action.
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.
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.
With a modest spring temperature of 25.7°C, heated bathing is standard at the facility. To fully appreciate the silky, alkaline texture of the water, begin with brief 3–10 minute immersions; as your body adjusts, gradually extend sessions to 15–20 minutes. After bathing, gently dab—rather than rinse—the mineral residue with a towel to preserve the skin's lasting smoothness.
This weakly alkaline spring (pH 8.7) delivers sodium ions at 224.3 mg/kg and bicarbonate ions at 207.3 mg/kg, gently dissolving aged skin cells and revealing a radiant, silken complexion. Metasilicic acid (40.3 mg/kg) excels in moisture retention, making it especially welcome for those battling dryness. Officially recognized for easing autonomic instability, insomnia, and depressive states, this water companions modern life's stress and sleep disruptions with genuine therapeutic warmth.
Those experiencing fever, malignancy, severe cardiac or renal conditions, or active gastrointestinal bleeding should refrain from bathing. Avoid immersion after alcohol consumption or during states of exhaustion; should dizziness or unease arise, exit the bath promptly and recline to recover.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- 竜泉寺温泉
- Spring type
- アルカリ性単純温泉（低張性・アルカリ性・低温泉）
- Source temperature
- 25.7℃
- pH
- 8.6
- Flow rate
- 116 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2025-10-10
- Analyst organization
- ケー・エス環境研究所株式会社 東京支店
- Registration No.
- 3東京都温泉分析第5号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 224 mg/kg
- Potassium ion K⁺
- 3.2 mg/kg
- Magnesium ion Mg²⁺
- 1.1 mg/kg
- Calcium ion Ca²⁺
- 6.6 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Total cations
- 0.24 mg/kg
Anions
- Fluoride ion F⁻
- 0.40 mg/kg
- Chloride ion Cl⁻
- 252 mg/kg
- Sulfate ion SO₄²⁻
- 2.0 mg/kg
- Bicarbonate ion HCO₃⁻
- 207 mg/kg
- Carbonate ion CO₃²⁻
- 6.2 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Total anions
- 0.47 mg/kg
Undissociated Components
- Metasilicic acid H₂SiO₃
- 40.3 mg/kg
- Metaboric acid HBO₂
- 19.4 mg/kg
- Total undissociated
- 0.06 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.90 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.77 mg/kg
- Component total
- 0.77 mg/kg
- Evaporation residue
- 0.66 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Chronic pain or stiffness in muscles and/or joints (rheumatoid arthritis, osteoarthritis, low back pain, neuralgia, shoulder pain, contusions, sprains and other chronic conditions), muscle stiffness due to motor paralysis, poor circulation, peripheral circulatory failure, gastrointestinal dysfunction, high blood pressure (mild), impaired glucose tolerance (diabetes), mild dyslipidemia, mild asthma or emphysema, hemorrhoids, stress-related symptoms (sleep disorders, etc.), post-illness recovery, fatigue recovery, health promotion. Indications by spring quality: autonomic instability, insomnia, depression
- Contraindications
- Active stage of disease (particularly with fever), active tuberculosis, advanced malignant tumors or severe cases of physical weakness such as marked anemia, severe heart or lung disease causing shortness of breath with minimal exertion, severe kidney disease with edema, gastrointestinal hemorrhage, visible bleeding, acute exacerbation of chronic disease
Drinking
- Drinkability
- Not drinkable
