Yahoo! JAPAN Ads API | Developer Center

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2025/07/01

Display Ads: Launch of the tracking tag and new conversion API

Updates

July 1, 2025: We completed this release and added links to help pages for the tracking tag and conversion API.
June 23, 2025: We announced this information.

Product

Yahoo! JAPAN Ads Display Ads

Date

June 30, 2025

Summary

We have launched the tracking tag and the new conversion API for Display Ads. At the time of launch, they are available only for Display Ads. We plan to make them available for other services in the future. Wait for further announcements with detailed schedules.
The current conversion tracking tags, site retargeting tags, and the previous version of the conversion API are still available. We recommend using the new tags and API if you are new to using conversion tracking.

■Tracking tag
The tracking tag is designed to measure the performance of various LY Corporation services. You can measure user behaviors (events) by installing this tag on your website. You can use the measured event data for conversion tracking and to store audience lists of website visitors.
You can use event data measured by a single tag for multiple purposes, simplifying tag management compared to the previous format, which required separate tags for each purpose. Additionally, you can measure conversions by specifying event types.

(Note)

  • The following tags previously provided by Yahoo! JAPAN Ads are not included in the tracking tag.
    • Site general tag
    • Complementary feature tag of conversion tracking
    • Site retargeting tag
    • Conversion tag
  • You can check the status of various event data sent from the tracking tag in the Campaign Management Tool.

For details on the tracking tag, refer to the following help pages:

■New conversion API
The conversion API is an API designed to measure and optimize ad performance more accurately. The conversion API is less affected by restrictions from enhanced browser security and ad blockers, letting you obtain more accurate tracking data.
You can use the event data measured with the new API not only for conversion tracking but also for storing audience lists of website visitors. You can obtain a more accurate measurement of advertising effectiveness by linking new parameters like "line_uid."

For details on the new Conversion API, refer to the following help pages:

Yahoo! JAPAN Ads Display Ads API

We plan to support the features in this announcement with Display Ads API v17, scheduled for release on June 30, 2025.
Changes will be as follows:

■Services

  • AudienceListService
  • ConversionTrackerService

■Changes
<AudienceListService>

  • Add null to the response's retargetingTagId.
  • You will be able to specify or return ruleType=EVENT_TYPE when audienceListType=WEBSITE_VISITORS.
  • Remove customAudienceId.
  • In add/set/remove, specifying retargetingTagId will become optional.

<ConversionTrackerService>

  • Add "LY_TAG_CONVERSION" to the conversionTrackerType enum.
  • Add a new field, lyTagConversion, under conversionTracker.

■About v17
See the following announcement for v17.
Yahoo! JAPAN Ads API v17 release

Document

Learn more in the following document.
Download document

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