Skip to content
ATDbbeta
Brief
Yahoo Japan was rebranded to LY Corporation (Oct 2023)— see LY Corporation for current status.

Yahoo Japan

Digital Advertising & Internet Services

LY Corporation (formerly Yahoo Japan) provides advertisers unmatched reach across Japan's internet users through integrated search, display, and programmatic advertising solutions, combined with first-party data from Yahoo Japan and LINE's massive user bases.

Last updated Aug 26, 2026 by ATDb automated enrichment

Founded
1996
HQ
Tokyo, Tokyo, Japan
Connections
18

At a glance

Employees
10001+
Revenue
$10B+
Stock
4689.T
16integrations
Demand Side Platform (DSP)Video Advertising PlatformProgrammatic Platform

About

Japan's dominant internet portal and digital advertising platform, commanding the largest share of Japan's search and display advertising market

Yahoo Japan, now operating as LY Corporation following its October 2023 rebrand, is Japan's largest internet services company and a cornerstone of the country's digital advertising ecosystem. Majority-owned by SoftBank Group, the company emerged from a 2021 merger between Z Holdings (Yahoo Japan's parent), LINE Corporation, and other SoftBank internet assets, creating one of Asia's most powerful integrated digital platforms. The rebrand to LY Corporation reflects the full integration of Yahoo Japan and LINE's operations under a unified corporate identity, though the Yahoo Japan brand continues to be used for consumer-facing products and services in Japan.

Business model

Marketplace

Target market

Enterprise

What they offer

  • Yahoo! Japan Search Ads

    Japan's leading search advertising platform with extensive keyword targeting and auction-based bidding

  • Yahoo! Display Ads (YDA)

    Programmatic display advertising network reaching millions of Japanese internet users across Yahoo Japan properties and partner sites

  • Yahoo! Japan Shopping

    Major e-commerce marketplace integrating product listing ads and retail media advertising

  • LINE Ads

    Social and messaging-based advertising platform leveraging LINE's dominant position in Japanese mobile messaging

  • Yahoo! Japan News

    Japan's most-trafficked news aggregator offering premium native and display advertising placements

  • Yahoo! Auction (Yahoo! Okoku)

    Japan's largest online auction and second-hand marketplace with integrated advertising solutions

  • Yahoo! DMP

    Data management platform aggregating first-party audience data for precision ad targeting across Yahoo Japan and LINE properties

Key features

Japan's largest first-party data pool combining Yahoo Japan and LINE user dataIntegrated search and display advertising across a single platformProgrammatic buying via Yahoo! Display Ads networkCross-device targeting leveraging LINE and Yahoo Japan login dataNative advertising formats across news, search, and e-commerceRetargeting and audience extension capabilitiesRetail media advertising through Yahoo! Shopping and Yahoo! Auction

Use cases

Search engine marketing (SEM) targeting Japanese consumersProgrammatic display advertising across Japan's top web propertiesSocial advertising via LINE for mobile-first campaignsRetail media and product listing ads on Yahoo! ShoppingAudience data activation for cross-channel campaignsBrand awareness campaigns via Yahoo! Japan News native adsRemarketing and CRM-based audience targeting

Customer segments

Large Japanese enterprises and brandsE-commerce retailersFinancial services companiesAutomotive brandsTravel and hospitality companiesSMBs advertising in the Japanese marketInternational brands entering Japan

Tech & specs

Technology stack

Proprietary search indexing and ranking algorithmsProgrammatic ad serving and real-time bidding (RTB) infrastructureData management platform (DMP)Machine learning-based audience segmentationLINE messaging and social platform infrastructureCloud-based ad delivery network

Security & compliance

APPI (Act on the Protection of Personal Information — Japan)GDPRISO 27001

Deployment

Cloud

API

Yes

Explore further

3 views
On the AtlasDemand-Side PlatformsOn the Mapby country + regionOn the GraphNetwork around Yahoo Japan