Updates
March 3, 2025: We completed this change.
January 21, 2025: We added "Request to customers."
November 21, 2024: We posted this article.

Products

Yahoo! JAPAN Ads Search Ads
Yahoo! JAPAN Ads Display Ads

Date

February 28, 2025
*We stop communication using the legacy tags starting March 1, 2025.

Summary

Yahoo! JAPAN Ads terminate the legacy tag system because a certain period has passed since the end of support. As a result, requests to the following domains may fail due to the inability to communicate using the legacy tags.

Products	Domain	Description
Search Ads	b91.yahoo.co.jp	Domain for the legacy conversion tag
	b97.yahoo.co.jp	Domain for the legacy site retargeting tag
Display Ads	b90.yahoo.co.jp	Domain for the legacy conversion tag
	b92.yahoo.co.jp	Domain for the legacy site retargeting tag

Websites with legacy tags still in place may experience issues with JavaScript functionality after the system termination date. For this reason, kindly check your site's source code and settings to remove any tags that include these domains.

Notes

If you don't remove the legacy tags, JavaScript may stop functioning on some websites, depending on their design. To avoid unexpected issues, kindly remove them.

Comments

The legacy tags stopped receiving support in February 2024.
Learn about end of support for previous conversion tag and site retargeting tag.