Tokyo Court Rules AI-Copied Voice Violated Actor's Rights

A Tokyo court ruled on Wednesday that the human voice enjoys the same legal protection as publicity rights, handing a landmark victory to Kenjiro Tsuda, the actor whose "lustrous" baritone he claims was cloned by an AI tool powering a TikTok account.

The decision by the Tokyo District Court closes — at least for now — a closely watched legal action brought against TikTok. Tsuda is best known for voicing the character Kento Nanami in the anime series Jujutsu Kaisen, and his voice is central to his professional identity and commercial value.

The case began with a TikTok account whose AI-generated videos, Tsuda claimed, reproduced his voice. According to the actor, the tool copied what he described as his "lustrous" voice — the distinctive vocal signature that has made him one of Japan's most recognizable performers in anime and related media.

What the court decided

The Tokyo District Court's core finding is that voices fall under the same protection as publicity rights. Publicity rights allow individuals — particularly celebrities and public figures — to control and profit from the commercial use of their name, likeness, and other identifying attributes. By extending that framework to the voice itself, the court has created a new legal basis for performers to challenge AI-generated imitations of how they sound.

That matters well beyond one actor. Voice cloning tools have become cheap, accessible, and convincing, and the ruling gives performers in Japan a precedent for going after the platforms and accounts that distribute synthetic copies of their voices. The case was described in coverage as a landmark verdict to protect publicity rights, and it is being watched as a test of how existing personality-rights law — rather than new AI-specific statutes — can be applied to generative tools.

Why it matters

The judgment lands amid a global scramble to define what AI systems may legally copy. Voices sit in an uncomfortable gap in many legal systems: they are deeply personal and commercially valuable, but they have often received weaker protection than faces or names. A ruling that treats a cloned voice as a violation of publicity rights changes that calculation for AI developers, platforms, and the creators who use voice-generation tools.

For TikTok, the decision increases pressure on platforms to police AI-generated content that impersonates real people. For performers like Tsuda, whose income depends in large part on the distinctiveness of their voice work in anime, the ruling establishes that this asset cannot be reproduced without consequence.

Tsuda's role as the voice of Kento Nanami in Jujutsu Kaisen made him a fitting plaintiff: anime voice actors occupy an unusually prominent cultural position in Japan, and their voices are the product audiences pay for. The court's recognition that a voice carries protectable value reflects that economic and cultural reality.

The stakes going forward

The decision does not end the broader debate over AI and likeness. It establishes a precedent in one jurisdiction, in one case, against one platform. But it signals that courts are willing to stretch established doctrines — publicity rights, in this instance — to cover the new factual patterns created by generative AI.

As voice cloning becomes routine, expect further litigation testing the boundaries the Tokyo District Court has now drawn, and expect performers' representatives in other jurisdictions to cite the Tsuda verdict as they press for equivalent protection elsewhere.