Top 9 Internet service providers in Japan
This curated ranking covers the 9 largest internet service providers in Japan, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. Starlink, NetCologne and Open Fiber lead the list with a combined estimated audience of 744,608 people. Across all 9 entries the average audience size is 82,870, and the largest, Starlink, reaches around 743,929 people in Japan. Audience size is the estimated number of unique people in Japan who actively engage with each internet service provider, 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 |  Starlink |
743,929 | 1.6% | Internet service provider | Technology & Electronics |
| 2 |  NetCologne |
342 | 0.0% | Internet service provider | Technology & Electronics |
| 3 |  Open Fiber |
337 | 0.0% | Internet service provider | Technology & Electronics |
| 4 |  Netze BW |
284 | 0.0% | Internet service provider | Technology & Electronics |
| 5 |  Wilhelm.tel |
239 | 0.1% | Internet service provider | Technology & Electronics |
| 6 |  EWE TEL |
212 | 0.2% | Internet service provider | Technology & Electronics |
| 7 |  EWE NETZ |
209 | 0.1% | Internet service provider | Technology & Electronics |
| 8 |  NetCom BW |
166 | 0.1% | Internet service provider | Technology & Electronics |
| 9 |  Osnatel |
116 | 0.0% | Internet service provider | Technology & Electronics |
Frequently asked questions
How is this Top 9 list compiled?
Rascasse aggregates anonymized search-behavior signals across Japan and ranks each internet service provider 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 internet service provider in Japan?
Starlink currently leads with an estimated audience of 743,929 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.