LINE is Japan’s largest social media platform by audience estimate in 2026, with 99 million monthly active users. YouTube ranks second at an estimated 81.0 million users, followed by Twitter/X at 68 million, Instagram at 66 million, and TikTok at 33 million.
This data is useful context for brands planning social media campaigns in Japan. The figures below are planning estimates rather than a single platform-reported metric: some sources publish monthly active users, while LinkedIn reports registered members and Ameblo is shown by visitors. Note is included because it remains an important Japanese publishing and creator platform.
| Rank | Platform | Audience estimate |
|---|---|---|
| 1 | LINE | 99 million |
| 2 | YouTube | 81.0 million |
| 3 | Twitter / X | 68 million |
| 4 | 66 million | |
| 5 | TikTok | 33 million |
| 6 | Ameblo | 29 million visitors |
| 7 | 26 million | |
| 8 | 12.8 million | |
| 9 | Note | 10 million members |
| 10 | 5.4 million members | |
| 11 | BeReal | 5 million |
| 12 | Twitch | 4 million |
For influencer marketing, the platform mix matters. Instagram is still essential for visual creator campaigns, Twitter/X is important for conversation, fandom, entertainment, gaming, anime, and real-time discussion, while Note can be useful for deeper creator-led writing and niche communities.
