'Pure spring water comes from rain and snow falling on the mountains in Gunma, Shizuoka and Hiroshima Prefecture is what A. konjac plants feeds on. These natural resources sink through the outer shell, hit the water-tight layer underneath, and form an underground layer of water flowing down the mountain, over geological formations of igneous basalt rock. 

As the water passes over and through the volcanic gravel, it’s naturally filtered and purified and picks up key minerals such as calcium, magnesium, potassium, and sodium, as well as traces of vanadium and zinc — all of which support everyday human health requirements - the 'natural means to longevity'.

Such nutritional value of natural water is uncommon in other countries that cultivate Amorphophallus Konjac. And for thousands of years, Japan is arguably the native location for A. konjac cultivation.