Japan Court Recognizes Voice as Protected Identity in AI Lawsuit
Tokyo court ruled unauthorized AI voice cloning infringes performer's publicity rights.
Why it matters: This ruling sets a key legal precedent on protecting voice data against AI-generated copies. It could shape future frameworks around AI content and intellectual property rights for performers globally.
- Tokyo District Court ruled on September 30, 2026, that unauthorized use of a performer's voice infringes publicity rights.
- Kenjiro Tsuda, voice actor for 'Jujutsu Kaisen' and 'Yu-Gi-Oh!', filed the lawsuit.
- 188 AI-generated videos imitating Tsuda’s voice were posted on TikTok between July 2024 and September 2025, each averaging 1.47 million views.
- The responsible TikTok account had 210,000 subscribers, earning ¥500,000 to ¥750,000 monthly.
In a landmark decision on September 30, 2026, the Tokyo District Court ruled the unauthorized use of a performer's voice via AI constitutes an infringement on publicity rights. This case, the first of its kind in Japan, was brought by Kenjiro Tsuda, a prominent voice actor known for his work in popular anime such as Jujutsu Kaisen and Yu-Gi-Oh!
Between July 2024 and September 2025, a TikTok account posted 188 videos narrated by an AI-generated voice that closely imitated Tsuda’s voice. Each video garnered approximately 1.47 million views, with the account amassing around 210,000 subscribers and generating monthly earnings between ¥500,000 ($3,100) and ¥750,000.
Presiding Judge Aya Takahashi stated, "The unauthorized use of a performer's voice... can be considered an infringement on publicity rights." While the court dismissed Tsuda's demand for TikTok to remove the videos, noting they had already been deleted, the ruling nonetheless recognized voice as an identity deserving protection.
The ruling aligns with guidelines released in August 2026 by a Justice Ministry panel of experts, which affirmed that voices, like images, should be protected under publicity rights. Yuko Sasaki, Executive Director of the Japan Actors Union, noted, "An actor's voice is the result of years of rigorous training and apprenticeship," underscoring the importance of safeguarding this unique personal asset.
The entertainment industry has expressed concern over AI voice cloning, fearing unregulated use could harm performers’ livelihoods. Actor Bin Shimada, part of the 'No More' campaign group, warned, "Our industry can be crushed if a court win for TikTok triggers unbridled AI voice cloning on social media."
This ruling sets a critical precedent in Japan’s legal landscape, potentially influencing international discussions on AI-generated content rights and intellectual property protections for performers worldwide.
By the numbers:
- 188 videos — AI voice-cloned content posted on TikTok
- 1.47 million views — average per AI-generated video
- ¥500,000–¥750,000 — monthly earnings from the TikTok account
Yes, but: The court denied Tsuda’s demand to remove the AI-generated videos since they were already deleted, limiting immediate remedies.
What's next: This judgment may lead to strengthened legal protections and clearer regulations for AI-generated voice content in Japan and beyond.