A modern arrangement of the "drinking spring" that has been handed down since ancient times. SAYU, a craft hot spring beverage, has redefined mineral water and thoroughly polished the ingredients contained in it, "mineral".
Onsen, one of the world's leading natural multi-mineral beverages that absorbs plenty of nutrients from the soil, can supplement important trace elements that are difficult to get through diet and supplements.
You can drink it as it is without diluting it.