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Wit Studio shocked anime fans yesterday by confirming generative AI was used in the opening of its latest hit series. The studio behind Attack on Titan’s first three seasons admitted AI-generated backgrounds appeared in Ascendance of a Bookworm Season 4 after a six-day investigation. Now they’re scrambling to redraw the entire sequence by episode two.
🔥 Quick Facts
- Studio: Wit Studio confirmed AI usage in opening sequence on April 10
- Series: Ascendance of a Bookworm Season 4 premiered April 4, 2026
- Promise: Redraw opening completely with human artists for episode 2 onward
- History: This marks the second time Wit Studio has been caught using AI art
How Fans Discovered the AI Art
Animation enthusiasts spotted unmistakable AI-generated backgrounds within hours of episode one’s Crunchyroll debut on April 4. Screenshots shared on X/Twitter showed telltale signs of AI art: blended elements, fused architecture, and warped details that human artists never create. The posts went viral across anime communities. Fans expressed sharp disappointment that Wit Studio, a beloved name in anime, had taken this shortcut. The backlash intensified daily, forcing the studio’s hand.
Within six days of the premiere, mounting pressure from fans worldwide led Wit Studio to launch an internal investigation. On April 10, they released an official statement confirming what everyone suspected: generative AI had been used.
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Wit Studio’s Full Apology and Redemption Plan
In their statement, Wit Studio took full responsibility for the incident. They wrote: “Despite this, the current situation has occurred solely due to shortcomings in our production management and inspection systems.” The studio emphasized it has “in principle, not permitted generative AI” in video production yet failed to prevent it. They promised immediate action: the opening will be completely redrawn by human artists starting with episode two. Episode one will also receive a replacement opening sequence.
Yoshiaki Iwasaki, the director, oversees production at Wit Studio. The studio also clarified that NAM HAI ART, the background production company, bore no responsibility. One cut contained the AI art, though the studio says no other AI imagery appears in the series itself.
Why This Incident Damages Trust
| Aspect | Details |
| Studio Reputation | Wit created Attack on Titan’s finest seasons, Spy x Family |
| Prior Stance | CEO previously pledged no overwork unlike competitors |
| Broken Promises | Claims to support animators now ring hollow after AI usage |
| Fan Impact | Audiences feel betrayed when AI generates missed craftsmanship |
“Why should anyone care about something nobody bothered to make in the first place?”
— Industry observers questioning AI in creative works
This Is Wit Studio’s Second AI Offense
Anime fans with long memories recalled 2023’s scandal: the Netflix short “Dog and Boy.” That five-minute experimental film credited AI as a co-creator of backgrounds. Netflix Japan justified it bluntly: “As an experimental initiative to address labor-short anime industry, image generation technology is utilized.” The background artist was credited simply as “AI (+ Human)” in the credits, erasing the human artist’s proper recognition. Wit Studio had promised better standards since then. The broken promise makes this 2026 incident even more damaging.
In interviews following the Dog and Boy incident, Wit CEO George Wada emphasized the studio’s commitment to hiring employees as full-time creators with proper salaries. This statement now appears hollow given this week’s admission.
What Does This Mean for Japan’s Anime Industry?
Wit Studio’s decision signals a deeper crisis in anime production: labor shortages and impossible schedules now drive studios toward AI shortcuts. The anime industry chronically underpays freelancers and overworks staff, creating conditions where AI becomes an attractive option despite fan backlash. Multiple studios have explored AI for backgrounds and in-betweening throughout 2025 and 2026. Will Wit’s apology and redraw set a precedent that stops the trend, or will it become routine? The next few weeks of anime releases will reveal whether Ascendance of a Bookworm‘s redemption inspires industry-wide change or becomes a forgotten footnote in the ongoing AI versus artistry debate.
