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This article applies to selling in: Japan

ASIN creation policy

To sell a product available in the Amazon catalog, match it to the existing ASIN by creating an offer. If your product is not in the Amazon catalog, you will have to create a single new ASIN for the product.

ASIN creation limit

To protect the onsite shopping experience for our customers, we limit the number of listings (offers and ASINs) you can create in a given week until you establish a sales history with Amazon. As you increase your sales, your capacity will increase. We encourage you to prioritize the products you are listing to increase your sales quickly.

Additionally, if you are an established seller and have created a high number of new listings, we reserve the right to temporarily remove your ability to create new listings. We will reevaluate your status on a weekly basis.

If you think your listing creation privileges have been removed in error, please contact Seller Support.

Duplicate ASIN creation policy

Creating a new ASIN when the product already exists in Amazon's catalog is prohibited and can result in your ASIN creation or selling privileges being temporarily suspended or permanently removed.

Matching your products to existing products in Amazon’s catalog helps drive a high-quality customer experience. Matching to an existing product instead of creating a duplicate listing allows you to more fully benefit from buyer interest and traffic for that product.

How are duplicates created?

Duplicates are most commonly created when one or more of the following happens:

  • You incorrectly use the UPC, EAN, ISBN, ASIN, or JAN not belonging to the product (such as from another product) to identify the product you are selling.
  • You are an Amazon Brand Registry seller using an alternative key attribute to list your products. If you use multiple key attribute values to list the same product, a new ASIN will be created for each key attribute value.
  • You have received a product identifier exemption for a product that actually has a product identifier. Listing it without an identifier will create a duplicate.

Tips to avoid creating duplicate ASINs

Ensure that you always use the appropriate UPC, EAN, ISBN, ASIN, or JAN code when listing a product. The codes are reliable data that can be used to match your products to existing products in the catalog. Using incorrect UPC, EAN, ISBN, ASIN, or JAN codes to list a product is prohibited and can result in your ASIN creation privileges being suspended or permanently removed. Listed below are alternatives to help you list your product if it does not have one of these standard product identifiers:

Request a brand or SKU-level UPC exemption

If the product you are listing has been confirmed to have no known UPC, EAN, ISBN, ASIN, or JAN code and if you are listing a unique selection, you can request a brand or SKU-level UPC exemption. Visit "How to List Products That Do Not Have a GTIN" for eligibility information.

Variation policy

The following prohibited practices are misuses of variations (also known as parent-child relationships). They create a negative customer experience and can result in your ASIN creation or selling privileges being temporarily or permanently removed:

  • Adding incorrect child variations that are not true variations of the parent product. This includes but is not limited to:
    • Adding incorrect variation to ASINs you created.
    • Adding products that are fundamentally different from the parent ASIN.
    • Adding products that are newer versions or models of the parent ASIN.
  • Changing the parent product's detail page so it does not match the children.
  • Adding multi-pack variations that aren’t manufacturer-created to an already existing parent.
    • If you’ve created a multi-pack listing that is not directly sold by the manufacturer, you must match your listing to an identical multi-pack product detail page. If an identical multi-pack detail page doesn’t exist, you must create a new product detail page with its own unique UPC.
  • Adding multi-pack children by bundling two or more of the same manufacturer products, that is, bundling two three-packs to create a package quantity of six. Multi-pack children must be packaged by the manufacturer. If a customer wants to buy two or more of the same product, they can select that quantity for purchase.
Note: For more detailed information on variation best practices, please visit the Variation Help page.

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