The digital landscape is rapidly evolving, bringing with it both innovation and new challenges. One of the most significant discussions in the entertainment industry right now revolves around the rise of generative AI and its potential impact on creative professionals. Particularly, voice actors are finding their unique talents at the forefront of a burgeoning legal debate. A recent case in Japan involving a prominent voice actor and a major video-sharing platform highlights these complex issues.
The Tsuda vs TikTok Saga
Voice actor Kenjirō Tsuda recently took legal action against the operator of TikTok, alleging that videos posted on the platform used AI to imitate his distinct voice without permission. The lawsuit sought the removal of these videos. These posts, uploaded by an unidentified individual between July 2024 and September 2025, consisted of at least 188 videos discussing urban legends and conspiracy theories. The revenue generated from these videos was substantial, estimated between 500,000 and 750,000 yen (about US$3,000 to US$4,500) monthly.
However, the Tokyo District Court ultimately dismissed the lawsuit. The reason for the dismissal was that the videos in question had already been removed by the Singaporean company operating TikTok in Japan, following the lawsuit's filing in November 2025. The company argued that Tsuda no longer had a legal interest in continuing the case.
Legal Battleground: Publicity Rights and AI
Despite the dismissal, the legal arguments made by both sides shed crucial light on the emerging landscape of AI voice protection. Tsuda's legal team contended that the narration in the videos was generated by AI, designed to mimic his characteristic "smooth, low-pitched" and "deep, husky" voice. They argued that this was misleading viewers into believing it was genuinely Tsuda's voice, thereby attracting an audience.
The claim was based on the Unfair Competition Prevention Act and the right of publicity. The right of publicity is a fundamental protection for public figures, like celebrities and entertainers, safeguarding their image from unauthorized commercial use.
In defense, TikTok's lawyers argued that the voice used was a "universal male voice" generated by training AI on the voice of the original poster's friend, as stated on the poster's external website. They maintained that there was no confusion among viewers and, therefore, no violation of the law. TikTok also denied any infringement of publicity rights, pointing to comments on the videos that primarily focused on the content itself rather than being drawn in by the narration's voice.
Ministry of Justice Weighs In: A Glimmer of Hope
Significantly, this case comes at a time when legal frameworks are beginning to catch up with technological advancements. In related news, an expert panel for the Ministry of Justice issued crucial guidelines in August. These guidelines address how existing laws should be interpreted to protect voices from unauthorized generative AI use. The panel explicitly indicated that the voices of voice actors and actors are legally protected under the right of publicity, much like their visual likenesses, such as photographs.
Furthermore, these guidelines introduced the concept of joint liability. Depending on the extent of their infringement, generative AI providers could potentially face joint responsibility for unauthorized use of voices. This development signals a proactive move by Japanese authorities to establish clearer boundaries and protections in the AI era.
What This Means for Voice Actors and Content Creators
While the specific lawsuit against TikTok was dismissed due to the removal of the videos, the underlying legal discussions and the Ministry of Justice's guidelines are monumental. They underscore a growing recognition of a voice artist's unique vocal identity as a protectable asset under the right of publicity. This offers a stronger legal foundation for voice actors to defend their work against unauthorized AI imitation.
For content creators leveraging generative AI, this also serves as a critical reminder of the need for ethical practices and due diligence. Understanding and adhering to these evolving legal interpretations will be crucial to avoid potential joint liability and ensure fair compensation for original voice talent. The anime and entertainment industries, heavily reliant on distinctive voices, will undoubtedly be watching these developments closely as they shape the future of creative rights in a technologically advanced world.
