The five elements

Water, Rice, Koji, Brewers, and Environment are the five elements determining the quality of sake.



1. Water

The five elements
An amazing amount of water is used during sake brewing process. Water is a crucial element; it is thanks to the quality of water that KURAS exist. Water which originates from natural deep springs or wells, must show stable chemical properties and a stable temperature.

Sake brewers classify water as KOU SUI (hard water) or NAN SUI (soft water), referring to its behaviour in the fermentation process. An important component of the right water is potassium and magnesium, which are necessary for yeasts and Koji to develop.