Yahoo! JAPAN Ads API | Developer Center

2025/06/18

Integrated "Business ID"

Products

Yahoo! JAPAN Ads

Tool

• Campaign Management Tool
• Campaign Editor
• Yahoo! JAPAN Ads API

Schedule

July 23, 2025
*This date is subject to change.

Summary

LY Corporation will integrate the "Yahoo! JAPAN Business ID" and "LINE Business ID" we offer through our corporate services and change them to "Business ID."
Announcement in Japanese.

As a result of this change, we will gradually shift the IDs used for Yahoo! JAPAN Ads from "Yahoo! JAPAN Business ID" to the integrated "Business ID."

LY Corporation will offer total business support to companies and stores, connecting diverse business solutions into a single solution. The integrated "Business ID" will allow seamless use of various services. Yahoo! JAPAN Ads plans to end using "Yahoo! JAPAN Business ID" in the future. We encourage you to integrate into the "Business ID."

For more information on how to integrate, check the Yahoo! JAPAN Ads help page after the release.

Download the following document to learn more about integrated Business ID of Yahoo! JAPAN Ads. (English version of this document will be ready soon.)

Download PDF

Changes in Yahoo! JAPAN Ads

Some specifications will change in Yahoo! JAPAN Ads to use the integrated "Business ID." Changes will be as follows:

Change sign-in method

You will be able to sign in with your integrated "Business ID" in the Campaign Management Tool and Campaign Editor of Yahoo! JAPAN Ads. Customers using LINE corporate services such as LINE Ads and LINE Official Accounts will also be able to sign in to Yahoo! JAPAN Ads using their "LINE Business ID," improving convenience.
Once you integrate to "Business ID," you will not be able to sign in with a one-time passcode using Yahoo! JAPAN Business ID. If you have not linked your Yahoo! JAPAN Business ID to your Yahoo! JAPAN ID and are using a one-time passcode to sign in, we recommend that you use your LINE Business ID business account to sign in after the integration.
The one-time passcode sign-in using Yahoo! JAPAN Business ID is scheduled to end around March 2026.

"Tool administrator" and "Tool access" will end

Applying "Tool administrator" and "Tool access" for Yahoo! JAPAN Business ID to Yahoo! JAPAN Ads will end. With the end of "Tool administrator" access, only users with "Admin access" will be able to add new employees (create new Yahoo! JAPAN Business IDs).
Note that the account access will continue to apply even after the tool administrator and tool access ends. The range of operations available for the account will not change.

Change specification of account transfers

Beginning with transfers after August 1, 2025, no changes or cancellations of access for business IDs of the original company will be made. The system does not change the access of the transfer account, which may allow unintended users to view and modify the account. Confirm your access before transferring your account.
See the following help page for details.
Notes on account transfer - Yahoo! JAPAN Business ID

Change specifications of account invitation

When inviting users to your account, you currently specify your Yahoo! JAPAN Business ID. After the implementation date, you will use their e-mail address to invite users.

Agency Portal (Japanese version) will be available without sign in
You won't need to sign in to view the agency portal after the implementation date.

Download the document at the beginning of this announcement for details on changes.

Notes

• You can integrate to "Business ID" even if you don't have a "LINE Business ID." A "LINE Business ID" will be issued upon integration.
• To use Yahoo! JAPAN Ads after the implementation date, an "Yahoo! JAPAN business ID" is required. When inviting new users to Yahoo! JAPAN Ads, issue a "Yahoo! JAPAN Business ID." Specify the Yahoo! JAPAN Business ID you have issued and integrate it into the "Business ID".
• When applying for Yahoo! JAPAN Ads or Yahoo! JAPAN Ads API, you will need to continue using your" Yahoo! JAPAN ID." After your application is complete, integrate your "Yahoo! JAPAN Business ID" linked to your "Yahoo! JAPAN ID" into your "Business ID."
• After the implementation date, even if a "Yahoo! JAPAN Business ID" approved with the Yahoo! JAPAN Ads API has the link removed from a "Yahoo! JAPAN ID," there will be no authentication error in the ad account. To revoke approval, refer to "Revoke an approved application" in the following page.
  Check / Revoke Approved Application