Moto Hakone Onsen

Hakone Volcano has been continuously active since about 400,000 years ago. The varied topography of the volcano has resulted in a number of hot springs with distinctive qualities.

There is a wide variety of hot springs, from alkaline simple hot springs that are gentle to the skin to acidic and sulfuric springs that are highly effective in sterilizing dermatitis and other skin conditions. There are also acidic and sulfuric springs that are effective against dermatitis and other skin conditions.

The area has a long history as a hot spring resort, and prospered as a therapeutic hot spring during the Edo period (1603-1868).

Simple sulfur spring

Sulfur springs are called “sanatorium springs. The definition of a hot spring is set forth in a law called the “Onsen Law,” and a sanatorium spring is one that can be used for the purpose of treatment in particular.

A sanatorium spring must contain more than a specified amount of a specified ingredient.
A sulfur spring must contain at least 2 mg of total sulfur in 1 kg of hot spring water. If 1 kg of hot spring water contains 1 mg or more of total sulfur, it is recognized as a “hot spring,” but if it contains less than 2 mg, it cannot be labeled as a sanatorium spring.

The unique smell of sulfur spring water is one of its attractions, but it also has many beneficial effects and advantages for the skin and body.
In addition to improving sensitivity to cold, constipation, and rheumatoid arthritis, which are general indications for hot springs, sulfur springs can be expected to improve atopic dermatitis, a form of allergic dermatitis, chronic skin diseases, chronic women’s diseases, menstrual disorders, arteriosclerosis, and high blood pressure.

Many women suffer from sensitivity to cold and constipation, and because it is also effective for chronic women’s diseases and menstrual disorders, sulfur springs are considered a popular hot spring among women. Sulfur springs are also sometimes referred to as “hot water for beautiful skin,” so inviting a woman to visit with you as a couple or a married couple may be a good choice.

Spring quality
simple sulfur spring
Efficacy
In addition to improving sensitivity to cold, constipation, and rheumatoid arthritis, sulfur spring water can be expected to improve atopic dermatitis, a form of allergic dermatitis, chronic skin diseases, chronic women's diseases, menstrual disorders, arteriosclerosis, and high blood pressure.

Hot spring water quality

Name of Onsen
Moto Hakone Onsen [Moto Hakone No. 44 (Hakone Town No. 7 steam well) and Ashinoyu No. 7 spring by steam creation spring].
Spring quality
Simple sulfur spring (hydrogen sulfide type) (former name: simple hydrogen sulfide spring)
Spring temperature
Fountainhead 78.1°C
pH
Source 3.9

Ingredients and quantity in 1 kg of hot spring water

(1) Ingredients and amounts

Cation Milligram Anion Milligram
Hydrogen ion (H+) 0.13 Fluorine ion(F-) 0.00
lithium ion(Li+) 0.00 Chloride ion(Cl-) 5.41
Sodium ion(Na+) 13.4 Hydrogen sulfate ion(HSO4-) 0.59
Potassium ion(K+) 1.59 Sulfate ion(SO42-) 146.0
Magnesium ion(Mg2+) 81.5 Nitrate ion(NO3-) 1.82
Calcium ion(Ca2+) 29.3    
Strontium ion(Sr2+) 0.10    
Ferrous ion(Fe2+) 0.03    
Aluminum ion(Al3+) 3.55    
Manganese ion(Mn2+) 0.35    
Zinc ion(Zn2+) 0.02    
Cation meter 56.6 Anion meter 153.9
Released component Milligram Trace Components Milligram
Metasilicic acid(H2SiO3) 121.0 Copper ion(Cu2+) 0.00
Metaboric acid(HBO2) 0.19 Lead ion(Pb2+) 0.00
Free carbon dioxide(CO2) 52.4 Cadmium ion(Cd2+) 0.00
    Total arsenic(As) 0.00
    Total mercury(Hg) 0.00
Free component meter 173.5 Trace component meter 0.00

(2)Total Components 439mg/kg

Contraindications, indications

The medical and curative effects of hot springs depend on the biological response to the temperature and other physical factors, chemical composition, geographical location of the hot spring, climate, changes in the user’s living conditions, and various other overall effects, and it is difficult to determine the efficacy of each hot spring based on its composition alone.

Contraindications and indications

■ General contraindications (for bathing)

Active stage of illness (especially with fever), active tuberculosis, advanced malignancy or severe debility such as high anemia, serious heart or lung disease that makes it difficult to breathe after slight movement, serious kidney disease such as swelling, gastrointestinal bleeding, visible bleeding, acute exacerbation of chronic illness.

■ Contraindications by spring type (for bathing)

Hypersensitive skin or mucous membranes, dry skin in the elderly

■ General indications (for bathing)

Chronic pain or stiffness of muscles or joints (rheumatoid arthritis, osteoarthritis, lumbago, neuralgia, frozen shoulder, bruise, sprain, etc.), muscle stiffness in motor paralysis, sensitivity to cold, peripheral circulatory disturbance, decreased gastrointestinal function (upset stomach, gas in the bowels, etc.), mild hypertension, impaired glucose tolerance (diabetes mellitus), mild hypercholesterolemia, mild asthma or emphysema, hemorrhoidal pain, autonomic instability, various symptoms due to stress (sleeping disorders, depression, etc.), recovery from illness, fatigue, etc. Mild hypertension, glucose intolerance (diabetes mellitus), mild hypercholesterolemia, mild asthma or emphysema, hemorrhoid pain, autonomic instability, stress-related symptoms (sleep disorders, depression, etc.), convalescence, fatigue, health promotion

■ Indications by spring quality (for bathing)

Atopic dermatitis, psoriasis vulgaris, chronic eczema, epidermal pyoderma, peripheral circulatory disturbance

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