Mayonnaise Day (Mayonēzu no Hi)

What Is Mayonnaise Day?

Every year on March 1, Japan celebrates "Mayonnaise Day." The date marks the moment in March 1925 when Kewpie Corporation began manufacturing and selling Japan's first mayonnaise. "March" is the month it first went on sale, and "the 1st" stands for Japan's "first" mayonnaise; the day was established by Kewpie and registered with the Japan Anniversary Association. It traces back to founder Toichiro Nakashima, who encountered mayonnaise while in the United States and developed an egg-yolk mayonnaise hoping to improve "the physique and health of the Japanese people."

The Magic of Egg and Oil: A Uniquely Japanese Evolution

Mayonnaise is said to have originated on the Mediterranean island of Menorca, but Japanese mayonnaise evolved in its own distinctive way. While whole-egg mayonnaise is the norm in most of the world, Kewpie — Japan's market leader — uses egg yolks only, giving it an especially rich, savory flavor. March 1 is a day to once again savor this thick, creamy taste, now known abroad as "Japanese mayo."

Balancing Health and Flavor

In recent years, many health-conscious versions of mayonnaise have appeared, including reduced-calorie options and those made with flaxseed oil. Made from simple ingredients — quality vegetable oil, eggs, and vinegar — mayonnaise also pairs well with vegetables whose fat-soluble vitamins are absorbed more easily when eaten with oil. March 1 is a good occasion to think about incorporating mayonnaise wisely into your daily meals for a tasty and healthy diet.

Tasty Facts About Mayonnaise

• Where the name comes from: One popular theory traces "mayonnaise" to a sauce served in the Spanish port town of Mahón — the "sauce of Mahón" (mahonnaise).
• The secret behind its shelf life without preservatives: The vinegar and salt in mayonnaise make it hard for bacteria to multiply.
• The power of egg yolk: Lecithin in egg yolk emulsifies oil and vinegar — two liquids that wouldn't normally mix — creating a smooth, creamy sauce.
• How many yolks? According to Kewpie, a 450g bottle of Kewpie Mayonnaise contains the yolks of 3.6 eggs. The first product in 1925 came in a glass jar, already featuring the Kewpie doll on its label.
• "Mayora": A widely used Japanese nickname for mayonnaise lovers who put it on absolutely everything.

Endless Possibilities in a Pure White Sauce

Mayonnaise Day celebrates the magic that turns ordinary ingredients into the star of the plate. With a squeeze of mayonnaise, everyday vegetables or leftover ingredients suddenly shine. On March 1, why not let your ideas spread as smoothly as mayonnaise and enjoy discovering new flavors? When you draw that white line across your plate, it might just spark a little joy in your heart too.

Ideas for Enjoying Mayonnaise Day

• Make a dish where mayonnaise is the star, like potato salad or shrimp mayo, and fully savor its richness
• Mix mayonnaise with soy sauce, miso, chili pepper flakes, or herbs to create your own "signature dip"
• Try making homemade mayonnaise with eggs, vinegar, and oil, and experience the almost magical moment of emulsification
• Cut your favorite vegetables into sticks and dip them in mayonnaise for a simple way to enjoy their natural flavor

One Squeeze Makes Today Even Tastier

March 1 celebrates the "flavor revolutionary" that transformed Japanese tables. Let's start the new month with mayonnaise's flexibility and the kind of warmth that everyone loves. May today be as rich and refreshing as a great dollop of mayonnaise!