Tokyo Court Recognizes Voice Rights in Landmark AI Ruling

A Tokyo court has acknowledged performers' commercial rights to their voices in a major AI ruling. The decision stems from a lawsuit filed by voice actor Kenjiro Tsuda against the TikTok platform operator. Tsuda claimed unauthorized use of AI-generated voices resembling his own constituted infringement of publicity rights. The Tokyo District Court ruled that unauthorized use of a performer's voice for commercial purposes could violate their publicity rights, which protect the commercial value associated with celebrities and well-known individuals.

While publicity rights have traditionally encompassed names and facial appearances, this case marks the first time a Japanese court explicitly recognized a person's voice could also be protected. The ruling comes as AI technology advances rapidly, making it easier to replicate recognizable voices with high accuracy. AI voice-cloning applications can generate a person's voice after analyzing a small number of recorded sentences, reproducing not only the sound and distinctive characteristics but also converting speech into other languages while retaining the speaker's vocal identity.

The technology offers benefits for performers and people who have lost their ability to speak due to illness or accidents, but it also raises concerns about unauthorized reproduction and consent. The Tokyo court's decision establishes an important legal precedent for disputes involving AI-generated imitations of recognizable voices and highlights the distinction between legitimate applications of voice-recreation technology and the unauthorized commercial exploitation of recognizable voices.