Asamai Shuzo is located in the Yokote Basin, celebrated as one of Japan's foremost areas for rice cultivation and pristine water sources. Nestled within this untouched environment are crystal-clear rivers and the revered underground water source, Biwa-numa Kansen. By harnessing the outstanding quality of local water and rice, Asamai Shuzo focuses solely on crafting junmai sake, enabling the natural excellence of the region's ingredients, including Akita rice, to take center stage in every bottle.

The Fune, which translates to "ship" in Japanese, refers to a traditional sake pressing method that resembles a hollowed-out boat or tub. In this process, filter bags filled with sake are carefully arranged within the Fune, forming a stacked configuration. A weight, typically a metal or wooden block, is then placed atop the stack of bags. Through the combined forces of gravity and pressure, exerted gradually over two days, the bags are compressed, allowing the sake to be separated from the rice solids.

This age-old technique of pressing sake yields remarkable results, imbuing the final product with a wonderfully fine texture and nuanced flavors. Unlike modern industrial methods, the Fune pressing process is conducted on a smaller scale, offering greater precision and control. As a result, the end product is characterized by unparalleled quality and complexity, reflecting the meticulous craftsmanship and dedication to tradition inherent in this time-honored practice.