One of the most common questions about sake is how to store it. Questions like “I found an old bottle of sake—can I still drink it?” or “Should I store sake in the refrigerator?” show that many people are surprisingly unaware of the proper storage methods. In this article, we’ll answer some of the most basic and frequently asked questions about how to store sake.
What is the Proper Way to Store Unopened Sake?
It's no exaggeration to say that exposure to sunlight or high temperatures can alter the flavor of sake. Therefore, the basic rule is to store it in a cool, dark place away from ultraviolet rays.
You may have a general idea of what a “cool, dark place” means, but what does it specifically refer to? Typically, it’s a location with a stable temperature between 1°C and 15°C (34°F to 59°F) and no direct sunlight. One of the most common examples is underfloor storage. However, not every home has this feature, and with the extreme heat of recent summers, even underfloor storage can become too warm.
For most households, the refrigerator is the safest place to store sake as a cool, dark environment. Ideally, you should place the bottle somewhere in the fridge where it won’t be frequently exposed to light—such as a section with fewer door openings. That said, this can be difficult with a standard home refrigerator. In that case, wrap the sake bottle in newspaper or store it in its original box. This helps shield it from light and temperature fluctuations caused by frequent door opening and closing.
In addition, it is required by law to display storage and consumption instructions on sake labels. If you look at the back label, you’ll often see phrases such as “Store in a cool, dark place” or “Keep refrigerated—even before opening.” In particular, if it says “Keep Refrigerated,” be sure to store it in the refrigerator. If the label does not mention refrigeration, the sake can be stored at room temperature, but a cool, dark place with minimal temperature fluctuations is still recommended. Unopened sake that has been stored properly can generally be enjoyed at its best for about six months to a year from the date of production.
What Is the Proper Way to Store Sake After Opening?
Once sake is opened, it becomes more prone to aging, and its flavor is likely to change. Therefore, if you can't finish it in one sitting, it's recommended to store it in the refrigerator.
This is especially true unpasteurized sake, and daiginjo sake, which should always be kept refrigerated. Storing them in the refrigerator rather than at room temperature helps slow down changes in quality, making it easier to preserve their flavor and aroma. If you want to slow down the aging process even further, consider setting your refrigerator to a lower temperature. For opened sake, it's best to consume it within about two weeks.
Is It a Bad Idea to Store a Sake Bottle on Its Side?
Wine is stored on its side to prevent the cork from drying out and shrinking, which helps avoid oxidation caused by air entering the bottle.
In contrast, storing sake on its side can cause the liquid to come into contact with the cap or crown seal, potentially altering the flavor. It can also increase the surface area exposed to air, accelerating oxidation. Therefore, it is generally recommended to store sake upright.
What is the ideal temperature for storing sake?
The ideal storage temperature for sake varies depending on its type. For unpasteurized sake, a temperature around 5°C (41°F) is recommended. Ginjo is best stored around 10°C (50°F), while junmai, honjozo, and futsushu can generally be stored at room temperature (around 20°C / 68°F) without issue.
A typical household refrigerator, according to JIS standards, maintains a temperature of 2–5°C (36–41°F) in the main compartment. Therefore, unpasteurized sake should always be refrigerated. Ginjo should also ideally be kept in the fridge, as temperatures around 10°C are uncommon in normal living environments.
For those who want to preserve sake quality more precisely, sake cellars are available, some of which allow sub-zero temperature settings. For long-term storage, a unit that can maintain temperatures below 0°C (32°F) is especially recommended.
Can Sake Be Aged Like Wine?
Sake does not have a clearly defined expiration date. However, this does not mean that its flavor remains unchanged forever. Even unopened, sake’s flavors can change over time depending on the storage environment—whether kept at room temperature or refrigerated. Because sake matures faster at room temperature, storing it in the refrigerator is generally recommended. The absence of a strict expiration date also opens up another way to enjoy sake—by aging it intentionally. In recent years, there has been growing interest in aged sake, known as jukuseishu or koshu, with more people appreciating the flavor changes that occur over several years or even decades. These aged varieties are sold commercially, but it’s also possible to age sake at home under the right conditions. For home aging, wrap the bottle in newspaper or other material to block out light, and store it in a cool, dark place. For sake that has been pasteurized, such as junmai or honjozo, aging at room temperature can work well. For more aromatic types like ginjo, aging in the refrigerator is more appropriate. As a general guideline, plan for at least 3 years of aging, and around 5 years for the sake to develop a characteristic amber hue. Ultimately, when to open and enjoy your aged sake is entirely up to you.
Which Types of Sake Are Suitable or Unsuitable for Aging?
Generally, sake like unpasteurized sake is considered unsuitable for aging. However, that does not mean it cannot be aged. If properly stored in the right environment, even unpasteurized sake can become delicious aged sake. I have personally tasted unpasteurized sake aged for over 10 years, and it had developed a very mellow and smooth flavor.
Store it properly and enjoy delicious sake.
No matter how delicious the sake is, if it is stored improperly, it will develop off-flavors and its original taste and aroma will be ruined. To fully enjoy sake, the first step is to store it correctly.
