The Digital Millennium Copyright Act (DMCA), passed in the United States in 1998, is the principal legal instrument by which Japanese rights holders take down unlicensed manga and anime hosted on US-based servers. The takedown-notice process is the practical mechanism through which infringement is addressed online, and its limits — particularly the displacement of scanlation to non-US infrastructure — shape the current scanlation ecosystem.
How DMCA takedowns work
Under §512 of the DMCA, an online service provider hosting allegedly infringing material is shielded from copyright liability if it removes the material promptly upon receiving a properly formatted notice from the rights holder. The notice must identify the work, the alleged infringement, and the rights holder; the recipient typically removes the content within hours to days. The process is the principal mechanism through which Japanese publishers address scanlation hosted on US-based infrastructure such as YouTube, Google Drive, or Imgur.
The displacement effect
DMCA pressure does not eliminate scanlation; it relocates it. Large-scale unlicensed manga and anime hosting has migrated successively away from US-hosted services (subject to DMCA), to services in countries with weaker copyright enforcement, to cryptocurrency-funded operations with deliberately obscured ownership. The result is that DMCA enforcement is partly effective at the surface (preventing accidental discovery via mainstream platforms) but does not displace the underlying scanlation economy.
Legitimate alternatives
Through the 2010s and 2020s, Japanese publishers and licensees have invested substantially in legitimate alternatives intended to compete with scanlation: simulcast streaming (Crunchyroll, originally licensed manga apps), publisher-owned digital reading platforms (Manga Plus by Shueisha, K Manga by Kodansha, Bookwalker by Kadokawa), and same-day translation of new chapters. The strategy has been partially successful: scanlation continues but a measurable share of historical scanlation audience has migrated to legitimate services.