Short answer

Kewpie is a product family, not one worldwide ingredient list. The cited Japan 450 g product and US-made 12 fl oz product have different current official ingredient statements. Choose by the exact bottle’s origin, ingredients, allergens, and storage directions rather than assuming a red cap guarantees the Japan formula. [1][2][3]

What it is

Kewpie describes its Japanese mayonnaise as an egg-yolk style product whose main ingredients are egg yolk, vegetable oil, and vinegar. The company also sells mayonnaise made for export and products manufactured in multiple regions. [2][4][3]

Why people want it after Japan

A shopper may remember the brand and bottle from Japan, then see a similar Kewpie package in the US. The exact product can still differ in manufacturing location, ingredient list, package size, certifications, and label directions. [1][4][3]

01

What to check before buying

01

Country or region

Identify the exact product and manufacturing statement. The cited US 12 fl oz listing says Product of USA and made in California; the cited Japan 450 g listing names Kewpie Corporation as manufacturer. [1][3]

02

Full ingredient list

The Japan listing starts with domestically manufactured edible vegetable oils, egg yolk, and brewed vinegar. The US listing starts with soybean oil, egg yolks, water, and distilled vinegar and includes additional listed vinegars and other ingredients. [1][3]

03

Allergens

The Japan listing declares egg, soy, and apple and notes egg white; the US listing declares eggs. Read the bottle you will consume because regional statements differ. [1][3]

04

Storage after opening

Both cited official pages say to refrigerate after opening and use within about one month, with Japan’s page specifying 1 to 10 degrees Celsius. [1][3]

05

Package identity

Match package size and product wording. The cited Japan product is 450 g; the cited US-made product is 12 fl oz. [1][3]

02

Japan vs overseas: what actually changes

Manufacturing statement [1][3]

Japan context

The cited 450 g Japan listing identifies Kewpie Corporation as manufacturer and describes a Japan domestic product.

Overseas context

The cited 12 fl oz US listing says Product of USA and made in California.

Buying decision

Check origin on the exact bottle.

Ingredient statement [1][3]

Japan context

The Japan product lists vegetable oils, egg yolk, brewed vinegar, salt, spices, seasoning, and spice extract, with listed allergens.

Overseas context

The US-made product lists soybean oil, egg yolks, water, multiple vinegars, salt, MSG, sugar, mustard flour, EDTA, and natural flavors.

Buying decision

Compare current official labels, not older blog summaries.

Label and certifications [1][3]

Japan context

The Japan page provides Japanese allergen, nutrition, and storage statements for its package.

Overseas context

The US page identifies the US-made product as certified gluten free and kosher and supplies its own US ingredient and allergen statement.

Buying decision

Treat certifications as product-specific.

A good fit if

  • You have checked the exact current ingredient and allergen label
  • The manufacturing region and package identity match what you want
  • You can refrigerate the product after opening

Pause if

  • You assume every Kewpie bottle worldwide has the same formula
  • You rely on an old comparison blog instead of the current label
  • An allergen on the exact package conflicts with your needs

03

Choose the category, then the model

Product category

Japan-market 450 g Kewpie mayonnaise [1][2]

Good for: Buyers specifically seeking the current Japan domestic product label

Tradeoff: Import availability and label language may vary

Retail links coming later

Product category

US-made 12 fl oz Kewpie mayonnaise [3]

Good for: US buyers wanting the current California-made listing

Tradeoff: Its ingredient list is not the same as the cited Japan 450 g product

Retail links coming later

This page may contain affiliate links. If you buy through them, we may earn a commission at no extra cost to you. Links do not affect our editorial conclusions.

04

FAQ

Is every Kewpie mayonnaise bottle the same?

No. The cited official Japan and US product pages publish different ingredient lists and manufacturing statements. [1][3]

Does the US-made Kewpie product contain MSG?

Yes. The current official US listing for the 12 fl oz Product of USA version includes monosodium glutamate and answers yes in its FAQ. [3]

How should it be stored after opening?

Refrigerate it. Both cited official pages recommend using it within about one month after opening; follow the exact bottle label. [1][3]

05

Sources

Every source below was checked on . Product specifications can change; reopen the exact model document before buying.

  1. キユーピー マヨネーズ 450 g product informationKewpie Corporation Japan · checked 2026-09-26Supports: current Japan ingredient list, egg, soy, and apple allergen declaration, 450 g package, storage, manufacturer
  2. キユーピー マヨネーズ: 原料Kewpie Corporation Japan · checked 2026-09-26Supports: egg-yolk style, main ingredients, vegetable oils, mayonnaise-specific vinegar
  3. KEWPIE Mayonnaise, 12 fl oz, Product of USAKewpie USA · checked 2026-09-26Supports: current US ingredient list, Product of USA, made in California, egg allergen declaration, storage, certifications
  4. Kewpie mayonnaise products worldwideKewpie Corporation · checked 2026-09-26Supports: egg-yolk product description, worldwide product families, export lineup, main ingredients