Every October 1st, sake lovers across the globe raise a glass to celebrate World Sake Day, a tradition that honors both the cultural roots of sake and its growing appreciation on the world stage.

When it comes to craft sake, every detail matters, from the rice variety to the brewing temperature. But there’s one crucial aspect in the process that often goes unnoticed: water.

Craft sake, a cherished Japanese tradition, relies heavily on the purity of its ingredients, particularly water.