The absence of optimally controlled refrigeration can, sadly, jeopardize the fine quality of excellent saké. All products at Yamanaka saké shop are kept at below-zero temperatures. We manage saké while keeping brewers' intentions firmly in mind and striving to deliver the product's highest quality unaltered. The saddest event for a brewer is for their saké to have a different taste for the end user than when it was produced. Yamanaka saké shop preserves and enhances the fine condition of saké before providing it to consumers.

The factors that degrade saké quality and alter its taste are exposure to UV rays, storage in high temperature areas, and exposure to large temperature fluctuations. Even 30 minutes of direct sunlight alters the color of saké, imparts odor to the bottle, ages the product, and has negative repercussions. Furthermore, saké exposed to light develops an abnormal smell called "light odor" and decreases significantly in quality. In this sense, saké is truly like a living organism. Since saké dislikes the UV rays emitted from fluorescent lights, we use incandescent bulbs in our refrigerators. The most comfortable environment for Japanese saké is a cool space with dim lighting.