Updates
August 5, 2025: We updated the announcement about the change specification of account transfers.
July 31, 2025: We updated the announcement about sign-in using the one-time passcode.
July 24, 2025: We completed this launch.
July 22, 2025: We updated "Notes."
July 18, 2025: We updated “Change sign-in method” under “Changes in Yahoo! JAPAN Ads.”
June 18, 2025: We announced this information.

Products

• Yahoo! JAPAN Ads

Tool

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

Date

July 23, 2025

Summary
LY Corporation has integrated 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.”
Refer to the following Yahoo! JAPAN Ads help page about integration.
Integrate your Business ID
Download the following document to learn more about integrated Business ID of Yahoo! JAPAN Ads.
Download PDF

Changes in Yahoo! JAPAN Ads
Some specifications have changed in Yahoo! JAPAN Ads to use the integrated “Business ID.” Changes will be as follows:

[Updated: July 18, 2025 / July 31, 2025]
・Sign-in using a one-time passcode was no longer available for Yahoo! JAPAN IDs integrated with the Yahoo! JAPAN Business ID after July 23, 2025. We have arranged for one-time passcode sign-in to be available again from 31 July 2025.
Note that this one-time passcode sign-in is scheduled to end around March 2026. To sign in, sign in with your Yahoo! JAPAN ID or integrate your Business ID with LINE Business ID.
・After 6 PM JST on the day of this release, you may be forced to sign out of the tool. If you are signed out, sign in again.

• 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.
• “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
  [Updated: August 5, 2025]
  When your account transfer is completed on July 1, 2025, the system will change the business ID of the original company to read-only access. Change access as needed.
  
  After this launch, 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.

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

• Once you integrate your “Yahoo! JAPAN Business ID” and “LINE Business ID,” you cannot change them to another ID or remove a specific ID. Check your current “Yahoo! JAPAN Business ID” and “LINE Business ID” in advance, and make sure you do not make any mistakes when integrating your IDs. [Updated: July 22, 2025]
• You can integrate with “Business ID” even if you do not have a “LINE Business ID.” After the integration, you can select to sign in with your “LINE Business ID” Business Account or LINE Account.
• 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 to use 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