Does Kewpie Mayo Need to Be Refrigerated?

Last Updated on April 15, 2023 by Lauren Beck

If you’re a fan of Japanese cuisine, you’ve probably come across Kewpie Mayo. This creamy, tangy, and slightly sweet mayonnaise has become a staple condiment in Japanese cuisine, and it’s not hard to see why. 

Kewpie Mayo is delicious and versatile, but the question remains, does it need to be refrigerated?

Does Kewpie Mayo Need to Be Refrigerated?

Yes, Kewpie Mayo needs to be refrigerated. While it’s true that some mayonnaise brands can be stored at room temperature, Kewpie Mayo is not one of them. 

It contains raw egg yolks, which means it’s susceptible to bacterial growth if left unrefrigerated.

What is Kewpie Mayo?

Kewpie Mayo is a Japanese mayonnaise brand first introduced in 1925. It’s made with egg yolks, oil, vinegar, and spices and has a creamier texture and slightly sweeter taste compared to regular mayonnaise. Kewpie Mayo is also known for its distinctive packaging – a soft, squeezable bottle with a red cap and the iconic Kewpie doll logo.

How Long Does Kewpie Mayo Last?

Unopened Kewpie Mayo can last up to a year when stored in a cool, dry place away from direct sunlight. However, once the bottle is opened, the shelf life is reduced.

How Long Does Kewpie Mayo Last After Opening?

After opening, Kewpie Mayo can last up to two months when stored in the refrigerator. It’s important to note that the two-month shelf life is a general guideline and may vary depending on factors such as storage conditions and how frequently the bottle is opened and closed.

How to Tell if Kewpie Mayo Goes Bad?

Like all perishable foods, Kewpie Mayo can go bad. Signs that the mayo has spoiled include a change in color, an off smell, and a sour taste. If you notice any of these signs, it’s best to discard the mayo immediately.

Can You Get Sick from Bad Kewpie Mayo?

Yes, consuming bad Kewpie Mayo can make you sick. Bacterial growth can lead to food poisoning, which can cause symptoms such as nausea, vomiting, diarrhea, and fever. 

It’s always better to err on the side of caution and throw out any mayo you suspect may be spoiled.

Can You Freeze Kewpie Mayo?

Technically, yes, you can freeze Kewpie Mayo. However, it’s not recommended, as freezing can alter the texture and flavor of the mayo. If you decide to freeze Kewpie Mayo, transfer it to an airtight container and label it with the date before placing it in the freezer.

How to Defrost Kewpie Mayo?

To defrost frozen Kewpie Mayo, transfer the container to the refrigerator and allow it to thaw overnight. It’s important not to microwave or heat the mayo as this can cause the egg yolks to curdle and ruin the texture.

How To Store Kewpie Mayo After Opening

different sizes of kewpie mayonnaise

To store Kewpie Mayo after opening, always keep it in the refrigerator. Make sure the bottle is tightly sealed and stored away from raw meats and other potential sources of contamination.

How Is Kewpie Mayo Different From Regular Mayonnaise?

Kewpie Mayo is different from regular mayonnaise in several ways. First, it’s made with egg yolks instead of whole eggs, which gives it a richer and creamier texture. 

Second, Kewpie Mayo has a slightly sweeter taste compared to regular mayo. 

Finally, the packaging is different – Kewpie Mayo comes in a soft, squeezable bottle that makes it easy to dispense.

The Difference Between Japanese and American Made Kewpie

While Kewpie Mayo is a Japanese brand, it’s also produced in the United States. The Japanese-made version is typically sweeter and creamier, while the American-made version is tangier and has a firmer texture. 

The difference in taste and texture can be attributed to differences in the ingredients used and the manufacturing process.

Does Kewpie Mayo Have Preservatives?

Kewpie Mayo does contain preservatives to help extend its shelf life. The preservatives used are calcium, disodium EDTA and potassium sorbate.

What Does Kewpie Mayo Taste Like?

Kewpie Mayo has a unique taste that’s slightly sweeter and creamier compared to regular mayonnaise. It also has a tangy and slightly acidic flavor from the vinegar used in the recipe. Some people describe the taste as addictive and craveable [1].


Kewpie Mayo is a delicious and versatile condiment that’s popular in Japanese cuisine. While it’s important to refrigerate it once opened, you can enjoy it for up to two months if stored properly. Always be sure to check for signs of spoilage before consuming and discard any mayo that looks or smells off. Whether you’re using it as a dip, spread, or salad dressing, Kewpie Mayo is a must-try for any food lover.


Lauren Beck
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