Full Breakdown
Tokyo Court Recognizes Human Voice as Protectable Asset in AI Clone Dispute
By Drooid · · How we work
Core Ruling and Immediate Outcome
A Tokyo district court ruled that the human voice is covered by Japan’s publicity-right protections. Anime voice actor Kenjiro Tsuda sued TikTok for an AI-generated clone of his baritone used in videos on urban legends and conspiracy theories. The court held that unauthorized commercial use of a performer’s voice can infringe publicity rights, but it did not order the videos removed because the account had already been taken down. Tsuda’s claim was acknowledged; TikTok faced no deletion order.
Background: AI Voice Cloning and Industry Concerns
AI text-to-speech can replicate a voice from as little as 30 seconds of audio. Services such as Google’s Gemini and ElevenLabs have popularized the technology. Japanese performers have launched a “No More” campaign against unlicensed AI duplication, and Tsuda’s case is the first Japanese lawsuit to seek protection for a vocal identity.
Key Figures
- Kenjiro Tsuda – Anime voice actor, known for Kento Nanami in *Jujutsu Kaisen*.
- Judge Aya Takahashi – Presiding judge who authored the ruling.
- TikTok – Platform defending the content as a “generic male voice.”
- Yuko Sasaki – Executive director of the Japan Actors Union.
- Michihiro Ikemizu – Veteran voice actor supporting Tsuda’s claim.
Data & Statistics
- The TikTok account posted 188 videos between July 2024 and September 2025, gaining over 200,000 followers.
- Tsuda’s lawyers estimated potential earnings of ¥500,000 (? $3,200) per month from the unauthorized use.
Official Statements & Responses
The court described a voice as “a symbol of personality” comparable to a portrait, extending publicity-right coverage to vocal attributes used commercially. Michihiro Ikemizu emphasized that the human element of feeling and adaptation remains beyond AI’s reach.
Criticism & Opposition
Voice-actor groups, led by figures such as Bin Shimada, warn that unlicensed voice replication could “crush the industry.” They argue AI narration threatens the livelihood of performers who depend on the uniqueness of their vocal identity.
Verbatim Quotes
- “The unauthorised use of a performer’s voice … can be considered an infringement on publicity rights,” — Judge Aya Takahashi.
- “We will continue to sincerely work on the balance between technology development and rights protection,” — TikTok spokesperson.
- “The human voice is symbolic of individual personality, just like one's portrait,” — Judge Aya Takahashi.
- “You need to constantly feel and adapt while performing your role. That's something AI can never do,” — Michihiro Ikemizu.
What’s Next
TikTok said it will review the court’s reasoning to adjust its policies on AI-generated voices. Observers expect further legal challenges as performers seek clearer vocal-right protections in Japan and abroad.