Taenoyu Onsen (Gin no Yu)

Analysis Unverified
妙乃湯温泉(銀の湯)
Silver Waters Beside the Gold

The Taenoyu Onsen (Gin no Yu) source gushes naturally at the foot of Mount Komagatake in the Nyuto Onsenkyo, and it is called "silver water" as the clear counterpart to the brown, iron-rich golden spring. Mild and neutral, its faintly silky water wraps the skin gently. It soothes travelers who wish to rest after the sharp acidic bath or simply linger in a calm, gentle soak.

AI Generated
SPRING TYPE
Simple Spring

Spring water that is gentle on the skin with a very low likelihood of irritation. Safe for bathing infants and those with sensitive skin.

See features & indications
Bathing indications
Autonomic instabilityInsomniaDepression
Definition :Total dissolved solids (excluding gases) below 1,000 mg/kg; water temperature 25°C or above.
Source: 環境省「あんしん・あんぜんな温泉利用のいろは」(監修:日本温泉気候物理医学会)Read full article
PH VALUE
6.6
Neutral
Acidic ← 07 Neutral14 → Alkaline
Neutral (pH 6-7.5) per Japan Ministry of Environment classification. The pH range gentlest on the skin, suitable for long bathing.
TEMPERATURE
30.0
Low Temperature Spring
Below body temperature; bathing will gradually cool the body.
KEY MINERALS

The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).

Metasilicic acidSee detail
98.1 mg/kg

A natural moisturizer that leaves a hydrated feel on the skin.

Free carbon dioxideSee detail
211 mg/kg

Absorbed through the skin to gently promote peripheral circulation.

Bicarbonate ionSee detail
154 mg/kg

Softens dead skin cells for a silky bathing feel.

Metaboric acidSee detail
1.2 mg/kg

A trace component with gentle antibacterial and anti-inflammatory action.

Magnesium ionSee detail
14.1 mg/kg

Transdermal absorption gently supports skin hydration and muscle relaxation.

CHARACTER · COMPOSITION PROFILE
1234StimulationBactericidalSkin BeautyHeat RetentionRelaxation

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.

USAGE
Usage status is unknownInformation from facility postings or official sites has not been confirmed. Please check with staff on site.
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.

SENSORY TEST
Color
無色透明
Smell
無臭
Taste
無味
EFFECTS
Spring-specific indications (bathing)
Autonomic instabilityInsomniaDepression
General indications (bathing)
High blood pressure (mild)Rheumatoid arthritisChronic pain or stiffness in muscles and jointsMuscle stiffness due to motor paralysisGastrointestinal dysfunction
Contraindications
Acute illness (especially with fever)Active tuberculosisMalignant tumorsSevere heart diseaseRespiratory failureRenal failureBleeding disordersSevere anemiaAny actively progressing illnessPregnancy (especially early and late stages)
BATHING TIPS
AI Generated

The 30.0°C source is heated for bathing. Being a mild neutral simple spring, it rewards a relaxed 15 minute soak and works well as a finishing bath after the acidic golden spring.

EFFECT STORY
AI Generated

Neutral at pH 6.6 and gentle on the body, this simple spring eases tension and invites deep relaxation. Its 98.1 mg/kg of metasilicic acid leaves the skin soft, and it is traditionally associated with rejuvenation after a long day.

CAUTIONS
AI Generated

Avoid bathing during acute illness or with serious heart or lung conditions, and take care not to overstay in the bath.

※ See the analysis data below for detailed contraindications

ANALYSIS DATAView all analysis fields ▼

Source Info

Source name
Taenoyu Onsen (Gin no Yu)
Spring type
Simple Hot Spring
Old spring type name
単純温泉
Source temperature
30℃
pH
6.6
Flow rate
170 L/min
Flow type
自然湧出
Osmotic pressure
低張性

Analysis Document

Analysis date
2012-09-27
Analyst organization
財団法人 秋田県総合保健事業団 児桜検査センター
Registration No.
秋田第3号

Cations

Sodium ion Na⁺
31.3 mg/kg
Potassium ion K⁺
2.6 mg/kg
Magnesium ion Mg²⁺
14.1 mg/kg
Calcium ion Ca²⁺
23.7 mg/kg
Aluminum ion Al³⁺
< 0.1 mg/kg
Manganese ion Mn²⁺
< 0.1 mg/kg
Iron(II) ion Fe²⁺
< 0.1 mg/kg
Iron(III) ion Fe³⁺
< 0.1 mg/kg
Lead ion Pb²⁺
< 0.01 mg/kg
Copper ion Cu²⁺
< 0.01 mg/kg
Cadmium ion Cd²⁺
< 0.005 mg/kg
Total cations
0.07 mg/kg

Anions

Fluoride ion F⁻
0.10 mg/kg
Chloride ion Cl⁻
6.3 mg/kg
Hydrogen sulfide ion HS⁻
< 0.1 mg/kg
Thiosulfate ion S₂O₃²⁻
< 0.1 mg/kg
Sulfate ion SO₄²⁻
50.8 mg/kg
Bicarbonate ion HCO₃⁻
154 mg/kg
Nitrate ion NO₃⁻
1.6 mg/kg
Dihydrogen phosphate H₂PO₄⁻
< 0.1 mg/kg
Hydrogen phosphate HPO₄²⁻
< 0.1 mg/kg
Total anions
0.21 mg/kg

Undissociated Components

Arsenious acid HAsO₂
< 0.1 mg/kg
Metasilicic acid H₂SiO₃
98.1 mg/kg
Metaboric acid HBO₂
1.2 mg/kg
Total undissociated
0.10 mg/kg

Dissolved Gas

Free carbon dioxide CO₂
211 mg/kg
Free hydrogen sulfide H₂S
0.10 mg/kg
Total dissolved gas
0.21 mg/kg

Totals

Total dissolved substances
0.38 mg/kg
Component total
0.59 mg/kg
Evaporation residue
0.28 mg/kg

Usage

Usage status
Unknown

Indications & Contraindications

Bathing indications
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)

Drinking

Drinkability
Not drinkable
FACILITY INFO
AI draft (unverified)
Official site
Tattoo
Confirming
Private bath (Kashikiri)
Available
Bathing wear (Yuami-gi)
Paid rental
About tattoos and onsen
Travelers with tattoos can still bathe comfortably in a private bath (Kashikiri) or a room with a private open-air bath.
Hours
Weekdays: 10:3015:00
Weekends & holidays: 10:3015:00
Last admission at 2:00 PM
Closed days: Tuesdays (Open during Golden Week, Obon, and New Year holidays)
Transit
From JR Tazawako Station (JR田沢湖駅), take Ugo Kotsu Bus (羽後交通バス) bound for Nyuto Onsen (乳頭温泉) and get off at Myonoyu Onsen-mae (妙乃湯温泉前) bus stop. Immediately accessible. (Approx. 45-50 minutes)
Parking
Available (17 spaces, free)
Day use fee
¥1,000Children 500 yen (Elementary school age or younger)
Facilities
Indoor BathOpen-air BathMixed-gender Open-air BathPrivate BathWi-FiParkingShopVending Machines
House rules
The mixed-gender open-air bath has designated women-only hours.
Sources
This information may change without notice. Please contact the facility directly for accurate details.
How Long to Stay (Toji)
Start with 2 nights / 3 days

Japan’s Ministry of the Environment notes that even a short stay refreshes you. For a full therapeutic cure, around 2–3 weeks is the guideline.

More on toji length
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The descriptions, catch phrases, and translations on this page are generated by AI (Claude). pH, temperature, and component values are OCR-extracted from the official analysis report. Learn more