Explanations by Spring Quality

Gentle spring water suitable for everyone / For relaxation and beautiful skin

Hot springs with less than 1,000 mg of dissolved substances (excluding gaseous substances) in 1 kg of hot spring water and a spring temperature of 25℃ or higher at the time of gush. Hot springs with a pH of 8.5 or higher are called "Alkaline simple hot springs".
“Simple hot springs” components are not as concentrated (although in most cases it still contains several times more components than commercial bath salts), so there is less irritation to the skin and you can relax while bathing, which helps balance the autonomic nervous system (sympathetic and parasympathetic nerves). Particularly, due to the warming effect, the parasympathetic nervous system becomes dominant, which leads to the relaxation of tension, the reduction of stress and fatigue, and the improving the instability of the autonomic nervous system. Also, “Simple hot springs” are effective in improving Insomnia, as their gentle warming effect temporarily raises the body temperature and then relaxes the body and mind in the process of slowly lowering the body temperature, releasing tension and inducing natural sleep. Note that only “Simple hot springs” have “Insomnia” as an indication by spring type.
The above mental calming and relaxation effects of the warm baths also contribute to the improvement of Depression. Furthermore, because of its mild spring quality, it is suitable for rehabilitation and rest after strokes and other surgical operations, and is therefore also known as the “Hot springs for stroke”, “Hot springs for gout” and “Hot springs for neuralgia”. It is also called “Hot springs for family” because it is safe for babies and people with delicate skin to bathe in, and is less likely to cause “hot spring fatigue/bath reaction”. In particular, the “Weak Alkaline simple hot springs” (pH 7.5 or higher) and “Alkaline simple hot springs”(pH 8.5 or higher) are called “Hot springs for beautiful skin” because they remove dead skin cells, leaving the skin smooth and silky after bathing.
By the way, “simple” in “simple hot spring” means that the hot spring constituent is less than 1000 mg per 1 kg. The true character of the “Simple hot springs” cannot be understood without looking at the balance of dissolved substances, such as cations and anions, in the Hot Spring Analysis Reports.
In other words, even if there is not enough carbon dioxide, sulfur, iron, iodine, radon, and other components such as chloride, hydrogen carbonate, and sulfate ions to be reflected in the name of the spring, if each component is present to some extent, the characteristics of the hot spring can be seen.
The “Simple hot springs”, which are less irritating and allows for longer bathing, are widely known in Japan as “famous hot springs”.

• ■Old spring name・・・Simple hot spring (same as the new spring name)
• ■Color of water・・・Clear and colorless
• ■Taste & Smell・・・Basically tasteless and odorless, but both taste and smell change depending on the dissolved substances.
• ■Water texture・・・Feeling smooth, moist, etc. depending on dissolved substances. When alkalinity is strong, it feels thicker.
• ■Major hot spring inns・・・"Otaru Kourakuen" Otaru Asarigawa Onsen, Hokkaido／"Minakami Sansou" Tanigawa Onsen, Gunma Prefecture／"Kamisuwa Sinyu" Kamisuwa Onsen, Nagano Prefecture／"Oyado Dairoku" Yahiko Onsen, Niigata Prefecture／"Souan Kosumosu" Yufuin Onsen, Oiita Prefecture／"Yuuzen" Ueki Onsen, Kumamoto Prefecture
List of inns with this spring quality