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" symbolizes Japan's "number one" mayonnaise. The day carries the founders' passion for bringing this nutrient-rich Western condiment to Japanese tables and improving the health and physique 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 many overseas versions use whole eggs, most Japanese mayonnaise is made luxuriously with egg yolks alone, giving it an especially rich, savory flavor. March 1 is a day to once again savor this thick, creamy taste that gourmets around the world now praise 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 can actually help the body absorb certain nutrients more effectively. 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 have strong antibacterial properties that suppress bacterial growth.
• 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.
• The original mayonnaise: When it launched in 1925, the recipe used roughly twice as much egg yolk as today's version.
• "Mayora" culture: A nickname for people who put mayonnaise on absolutely everything — a phenomenon also recognized abroad as "mayora."

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!