Top 7 Advertising companies in Japan
This curated ranking covers the 7 largest advertising companies in Japan, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. AdMob, Ogilvy & Mather and Saatchi & Saatchi lead the list with a combined estimated audience of 222,062 people. Across all 7 entries the average audience size is 34,511, and the largest, AdMob, reaches around 162,732 people in Japan. Audience size is the estimated number of unique people in Japan who actively engage with each advertising company, derived from search demand signals. Rankings reflect search-behavior signals collected across Japan and are refreshed weekly.
Ranking
| Rank | Name | Audience size | Country share | Subtype | Category |
|---|---|---|---|---|---|
| 1 |  AdMob |
162,732 | 13.9% | Advertising company | Business & Career |
| 2 |  Ogilvy & Mather |
38,010 | 5.6% | Advertising company | Business & Career |
| 3 |  Saatchi & Saatchi |
21,320 | 4.5% | Advertising company | Business & Career |
| 4 |  BBDO |
17,728 | 9.7% | Advertising company | Business & Career |
| 5 |  Interpublic Group of Companies |
1,371 | 3.4% | Advertising company | Business & Career |
| 6 | DDB Worldwide |
346 | 0.9% | Advertising company | Business & Career |
| 7 |  TBWA Worldwide |
74 | 0.2% | Advertising company | Business & Career |
Frequently asked questions
How is this Top 7 list compiled?
Rascasse aggregates anonymized search-behavior signals across Japan and ranks each advertising company by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest advertising company in Japan?
AdMob currently leads with an estimated audience of 162,732 people in Japan.
Methodology
Audience sizes are estimated from anonymized search-behavior signals across Japan. Lists below 5 entries are not published. See methodology for full details.