Tokyo Court: Your Voice Is Protected in First AI Cloning Case
3 min readThe Tokyo District Court has ruled that a person’s voice is protected by publicity rights, handing down Japan’s first judgment in an AI voice cloning case. The September 30 decision, in a lawsuit brought by anime voice actor Kenjiro Tsuda against TikTok’s operator, treats a human voice the same way Japanese law already treats a celebrity’s name and face.
The AI voice cloning gap in Japanese law
Japan has no statute that names “voice rights.” Publicity rights, which let well-known people control commercial use of their identity, have historically covered images and names, not sound. That gap mattered little until generative AI made it trivial to clone a distinctive voice from a few minutes of audio.
Voice acting is a major cultural industry in Japan, and performers have watched similar disputes unfold in the United States and Europe with growing alarm. In August, a Justice Ministry expert panel recommended that voices be treated like images. The court has now reached the same conclusion on its own.
What the court decided
According to The Japan Times, Tsuda, known for roles in Jujutsu Kaisen and Yu-Gi-Oh!, sued over 188 TikTok videos posted between July 2024 and September 2025 that used an AI narration resembling his deep baritone. The account had about 210,000 followers, averaged roughly 1.47 million views per video, and earned an estimated 500,000 to 750,000 yen a month.
Presiding Judge Aya Takahashi wrote that the human voice is a symbol of an individual’s personality, just like an image, and that unauthorized use can infringe publicity rights when the aim is to exploit a person’s commercial appeal. TikTok had argued the narration was a generic male voice trained on a friend’s speech. Tsuda’s lawyers countered with acoustic analysis showing deliberate imitation.
The court dismissed Tsuda’s demand that the videos be removed, because the account and files had already been deleted. The principle, not the remedy, is the headline.
Why it matters
This is the first court in Japan to say a voice is identity rather than raw training material, and it gives performers and studios a legal foothold even when a platform deletes the evidence. For AI developers and content platforms operating in Japan, cloned narration of a recognizable performer now carries clear legal risk.
Watch for an appeal, for legislation building on the Justice Ministry panel’s advice, and for similar claims from the anime and gaming industries that rely on voice talent.
Japan’s courts have drawn a line that lawmakers had only discussed. The AI voice cloning debate in Asia now has a precedent.