In 2025, we saw the release of what has since become the biggest anime movie of all time, titled Demon Slayer: Infinity Castle Part 1 - Akaza's Return. Demon Slayer: Infinity Castle's box office success has made it a standout movie that has changed the industry forever.
While many fans were previously skeptical that Infinity Castle's massive success would lead to a shift in the anime industry, recent announcements of massive canon movies like Solo Leveling: Beyond the System and One Piece: God Valley have shown the impact of the release. While fans are happy to see more movie adaptations, this is undoubtedly going to lead to a massive change in the industry, for better or for worse.
Demon Slayer Season 4’s final episode set up with its ending a massive trilogy to conclude the story by Ufotable Studio. On July 18, 2025, the first movie of this trilogy, Demon Slayer: Infinity Castle Part 1 - Akaza's Return, enjoyed its debut in Japan, and a month later, it premiered globally. Immediately upon its release, both domestically and internationally, Infinity Castle became a massive success. In Japan, the movie stands as the second-biggest box office success of all time, only slightly behind its predecessor, Demon Slayer: Mugen Train. Internationally, however, the movie changed the game. Demon Slayer: Infinity Castle went on to amass over $750 million at the box office. It became the biggest anime movie of all time, far surpassing Mugen Train, which had a record of $512 million in comparison.
Such a massive success can simply not be overlooked, and since its release, the anime industry has taken notice. Studios have realized the massive financial incentive in creating theatrical releases of canon arcs over TV anime seasons. Previously, we had spoken about how Infinity Castle's massive success would impact the anime industry, and a year later, this observation has been proven true with the current shift of the industry.
Since the founding of the anime industry in Japan, the main focus has always been on TV anime when it comes to adapting manga or other source material. Before the late 2010s, weekly anime series were the norm, and episodes used to be released regularly. Through the consistent releases that weekly anime series offered, the stories they adapted were expanded upon, and arcs were covered in short amounts of time. Sometimes, studios even struggled to manage the space between the anime and the manga.
Eventually, studios almost fully shifted to seasonal anime, even for series like One Piece, which officially saw this shift in 2026. With seasonal anime, the gap widened between manga and anime, and the quality improved. Based on the current success of Demon Slayer: Infinity Castle, however, this gap is only going to be widened with the rise in production of anime movies over TV anime. Demon Slayer itself was the first victim of this new tactic. Its success with movies, which first started with the Mugen Train, led to the decision to adapt its two final arcs into movies.
Realistically, if Demon Slayer’s Infinity Castle and Sunrise arcs were adapted into TV anime, then in total, it would have taken around 3 years for the studio to wrap the series up, with about two anime seasons to seal the deal. However, now, because of the movie trilogy, these two arcs will take 5 years to wrap up, spanning from the end of Season 4 in 2024 to the reported release of the final movie in 2029.
Infinity Castle's success has clearly affected other studios and series as well. On July 5, 2026, Solo Leveling revealed that its next project would not be a third anime season but instead a theatrical movie release, titled ‘Solo Leveling: Beyond the System.’ While many believe this could be a coincidence, this is clearly inspired by the success of Infinity Castle, as confirmed in the A-1 Pictures committee reports from November 2025, which explicitly state the Studio's intention to replicate Infinity Castle to achieve huge success.
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