[Characteristics]
The hot springs of Unzen is characterized by its sulfurous hot water with
high acidity (pH: 2.0 - 2.2), which is uniquely high comparing to hot springs
in Europe where the hot springs treatment is actively performed.
The temperature of the hot springs of Unzen is as hot as around 90 Degree
Celsius. Unzen hot springs is known by its component of hot water such
as "acid hydrogen sulfide springs", "aluminiferous springs
including hydrogen sulfide" or "ferrous sulfate springs"
but it is generally called "sulfurous hot springs.
[Efficacy]
The hot springs of Unzen is highly effective in sterilization because of
its acidity.
It takes effect against skin diseases in general such as eczema, chilblain,
incisures, and other skin related problems.
It is also noted that the Unzen hot spring is effective to facial treatment
as well as effective against chronic rheumatism, diabetes, neuralgic pain,
muscle pain, joint pain, and fatigue with health-promoting benefits.