Is Kewpie Mayo Vegan? No -- It's Egg Yolk, Unless You Buy the Vegan Line

Kewpie is the mayonnaise you'll meet drizzled over takoyaki, okonomiyaki and potato salad all over Japan, and the standard bottle is not vegan -- its signature richer, yellower flavor comes specifically from using only egg yolk, never whole egg.

What's in the standard bottle

Kewpie's own ingredient page lists: edible vegetable oil, egg yolk, brewed vinegar, salt, spices, amino-acid seasoning, and spice extract -- with egg, soy and apple named as allergens. By Kewpie's own figures, a standard 450g bottle contains the equivalent of about 3.6 egg yolks. The egg yolk isn't incidental -- alongside oil and vinegar, it's one of the three ingredients Kewpie itself names as the mayonnaise's foundation.

The company also makes an official vegan version

Kewpie's US business sells a Kewpie Vegan Mayonnaise: expeller-pressed canola oil, water, distilled vinegar, salt, modified food starch, yeast extract, xanthan gum, mustard flour and mustard oil -- no egg of any kind. This is a genuine official Kewpie product sold alongside the traditional and organic lines, not an unrelated substitute brand borrowing the name.

Where hidden Kewpie shows up in Japan

Beyond the obvious squeeze bottle on the table, Kewpie-style mayonnaise turns up inside "spicy mayo" sushi rolls, folded into potato salad and coleslaw sides, and drizzled over katsu sando cabbage. See our guides to is takoyaki vegan, is okonomiyaki vegetarian and is sushi vegan for how mayo shows up in each of those specific dishes.

What to ask for

A simple, direct question works well: tamago nashi no mayonezu wa arimasu ka? (do you have an egg-free mayonnaise?). Kewpie's own vegan bottle is sold in the US and in some specialty and import shops; availability in ordinary Japanese supermarkets varies by store, so it's worth checking the organic or specialty aisle, or asking staff directly, rather than assuming it's stocked everywhere.

Ingredient lists above were checked directly against Kewpie's own official pages as of July 2026. Formulations can change, so check the bottle in front of you if you're strict.