Japan court recognizes commercial protection for human voices in AI case

Thursday 01 - 16:00

A Tokyo court has recognized that a person’s voice can receive legal protection when it is used commercially without authorization, in a ruling that could add a new dimension to Japan’s growing debate over artificial intelligence and digital identity.

The decision followed a lawsuit brought by Japanese voice actor Kenjiro Tsuda, who argued that a series of TikTok videos used an AI-generated voice resembling his distinctive vocal characteristics. The court acknowledged that unauthorized commercial use of a performer’s voice may constitute an infringement of image rights, although it stopped short of ordering TikTok to remove the disputed material.

A new legal question for AI-generated voices

Presiding judge Aya Takahashi said the commercial exploitation of an individual’s voice can fall within the scope of image rights when the purpose is to benefit exclusively from the person’s commercial appeal.

The ruling is significant because it extends the legal discussion surrounding personal identity beyond photographs and visual likenesses. The court considered a recognizable voice to be closely connected to an individual’s personality and commercial identity.

The case reportedly represents the first legal action in Japan specifically aimed at protecting a person’s vocal identity from AI-generated replication.

Kenjiro Tsuda’s voice at the center of the dispute

Tsuda, 55, is widely known in Japan and internationally for his work in major anime productions, including Jujutsu Kaisen and Yu-Gi-Oh!. His deep and distinctive voice has become an important part of his professional identity.

The lawsuit concerned TikTok videos featuring narration delivered in a particularly deep male voice. Tsuda argued that the vocal characteristics were sufficiently distinctive to identify him.

TikTok, however, disputed that interpretation. According to court documents reviewed by AFP, the platform argued that the recordings used a generic male voice and that any perceived similarity to Tsuda’s voice was subjective.

The court ultimately sided with Tsuda on the broader legal principle concerning unauthorized commercial use, while rejecting his request for the removal of the videos.

Implications for Japan’s entertainment industry

The case arrives as generative AI makes it increasingly easy to reproduce recognizable voices and appearances. For actors, singers and other performers, the technology creates new opportunities but also raises questions over consent, compensation and control over commercially valuable aspects of their identities.

The issue carries particular weight in Japan, where voice actors occupy a prominent place within the anime and entertainment industries. Some performers have developed exceptionally strong relationships with audiences, with their voices becoming closely associated with individual characters and franchises.

By recognizing that a voice may have commercial identity value comparable to a person’s visual likeness, the Tokyo ruling provides a new legal reference point for disputes involving AI-generated performances.

A potential benchmark for future AI disputes

The judgment does not establish that every AI-generated voice resembling another person is automatically unlawful. Its significance instead lies in the court’s recognition that vocal identity can fall within the protection of image rights when its commercial appeal is deliberately exploited.

As voice-cloning technology becomes more sophisticated, similar disputes could increasingly reach courts in Japan and elsewhere. The Tokyo decision therefore places questions of consent, personality rights and commercial exploitation closer to the center of the legal debate surrounding generative AI.