Hanayuu’s own source

Hot springs are a blessing given to us by nature, and they are also an important and limited resource. The hot spring of Hanayuu is pumped from underground and poured directly into bathtubs from the spout. No circulating, heating, or addition of water is necessary.
Therefore, you can fully enjoy this blessing of nature as it is.

Characteristics of Hanayuu hot spring

Metasilicic acid

A natural moisturizing agent which promotes skin metabolism, making skin smooth and beautiful. It helps with the production of collagen, keeping the skin fresh and white. For those suffering from skin problems such as dry skin and atopic dermatitis, bathing in hot springs can especially help improve and prevent such ailments. Generally, 50 mg/kg is considered effective for beautiful skin. Taken internally, it is effective in restoring gastric mucous membranes, so it is used in gastric therapeutics.

Metasilicic acid of Hanayuu: 79.3mg

Chlorine ion

When bathing in hot water that contains chlorine ions, the salt adheres to your skin, forming a thin film which causes a moisturizing effect. It prevents moisture from evaporating, which keeps us warm. This warming improves blood circulation. It is also said to have a strong sterilizing effect, and so is referred to as “hot water for wounds”.

Chlorine ion of Hanayuu : 83.0mg

Sulfate ion

Sulfate ions have the effect of sending more oxygen to the blood. Hot water containing sulfate ions is said to be effective in treating neuralgia, biliary tract disease and constipation, as well as improving diabetes and gout.

Sulfate ion of Hanayuu: 478.8mg

Hydrogen carbonate ion

Carbon dioxide gas absorbed into the skin dilates blood vessels and promotes blood circulation. Hot water containing bicarbonate ions is said to be effective in treating skin disease because sodium bicarbonate softens the surface of the skin. It is also said to have a pleasing moisturizing effect.

Hydrogen carbonate ion of Hanayuu: 43.3 mg

pH value

Regarding the hydrogen ion concentration (pH) value of hot spring water, a pH value closer to 1 is acidic, closer to 10 is alkaline, while 6~7.5 is considered neutral. The pH value of human skin is 4.5~6. Tap water, blood and sweat are very close to neutral. The pH value of the hot spring is close to the pH value of the skin. The closer the pH values are, the more beneficial the water is to the skin.

pH value of Hanayuu: 5.25

The calcium sodium sulfate spring water at Hanayuu is believed to be effective not only for general ailments but also for treating cuts, peripheral vascular disease, sensitivity to cold, depression and dry skin. It also has an anti-aging effect by moisturizing and firming the skin.

Hot spring questions

Is the hot spring at Hanayuu a flowing stream?
Yes, it is. The hot spring of Hanayuu is 100% “free flowing”. This is categorized as the way the source water is treated before it goes into the baths. In many cases no chemicals are added, and the original qualities of the hot spring can be enjoyed. The opposite of the free flowing type is the “circulating” type where the water naturally gushes from the source or is mechanically pumped into the bath. The water is then funneled or siphoned out of the bath, stored, circulated, mixed with chlorine-based chemicals, and then returned to the bathtub.

Are all the baths in Hanayuu “hot springs” that flow from the source?
Yes. It would be incorrect to say that all hot spring baths nationwide are true free flowing hot springs. Here, at Hanayuu, all our baths flow directly from the source hot spring and are 100% natural hot spring water.