Wit studio admits ai used in ‘ascendance of a bookworm’ opening – redraw incoming
The animation world just got a little less analog, and a lot more… algorithmic. Wit Studio, the studio behind beloved series like Spy x Family and Attack on Titan (Seasons 1-3), has issued a belated apology and a significant course correction following revelations that generative AI was employed in the opening sequence of Ascendance of a Bookworm Season 4.

A shocking revelation and a rapid response
Eagle-eyed Reddit users and Twitter/X observers raised concerns almost immediately after the season’s premiere, pointing to unnervingly consistent backgrounds and a certain… flatness in the visual style. The complaints, amplified by accounts like @ukloim, quickly went viral, exposing a critical misstep.
The initial uproar painted a picture of potentially compromised art direction, a concerning sign for an industry increasingly reliant on automation. But the truth, as Wit Studio now admits, is far more prosaic – and arguably more damning – than a simple oversight.
Internal investigations revealed that the studio’s production management systems, specifically regarding background art, had inadvertently utilized gen AI. This wasn’t a deliberate attempt to deceive; it was a failure of oversight, a critical flaw in the quality control process. The result? A visually jarring opening that betrayed the meticulous craftsmanship expected of a series built upon Miya Kazuki’s intricate light novel.
Wit Studio’s statement is blunt: “In principle, we have not permitted the use of generative AI in anime production in our works.” The exception, a rather awkward footnote, is ‘The Dog & The Boy,’ a 2023 experimental short. But the core message is clear: this breach represents a serious lapse. The studio is committing to a complete redrawing of the affected sections, promising a final, AI-free version starting with Episode 2. A necessary, if belated, correction.
Nam Hai Art, the company responsible for the backgrounds, has been quietly cleared of any wrongdoing – a crucial detail often lost in the initial flurry of accusations. This isn't about blame; it’s about accountability. Wit Studio is attempting to deflect criticism onto its own internal failings, a tactic that rings hollow considering the scale of the issue.
The incident underscores a broader, and increasingly urgent, concern within the anime industry. Amazon’s swift removal of the AI-generated English dub for Banana Fish served as a stark warning – a digital backlash against the soullessness of automated voices. As production workflows become increasingly fragmented and outsourcing expands, maintaining rigorous oversight becomes exponentially more challenging. The question now isn’t whether AI will permeate anime production, but rather how effectively producers will manage its integration – and, crucially, how they’ll prevent similar embarrassments in the future. Wit Studio's revised guidelines, once finalized, will undoubtedly be scrutinized.
“As the production company behind this series, we would like to apologize to all fans and to all the people involved, including the original author,” the studio stated. It’s a standard boilerplate, but one that feels desperately inadequate given the gravity of the situation. Let’s hope this incident serves as a potent, and lasting, reminder of the importance of human artistry – and the potential pitfalls of blindly embracing technological shortcuts.
