A pivotal moment for fans of the Demon Slayer: Kimetsu no Yaiba saga has arrived with the unveiling of a new trailer for the first film in the highly anticipated Infinity Castle trilogy. The trailer, which debuted to widespread excitement, confirms that celebrated artists Aimer and LiSA will contribute theme songs for the film, further solidifying their integral connection to the beloved franchise. This cinematic event promises to bring the climactic battles of the Infinity Castle arc to life with the signature animation quality of ufotable and a powerful musical score.
The Dawn of the Final Battle: Infinity Castle Arc
The Demon Slayer: Kimetsu no Yaiba – The Movie: Infinity Castle – Akaza Sairai (The Return of Akaza), as the first installment is officially titled, marks the beginning of the end for the anime series. This trilogy will adapt the final, intense chapters of Koyoharu Gotouge’s original manga, bringing the Demon Slayer Corps face-to-face with Muzan Kibutsuji in his labyrinthine stronghold. The Infinity Castle arc is renowned among fans for its relentless action, profound emotional depth, and the culmination of years of character development. It is here that Tanjiro Kamado and the Hashira are plunged into a perilous dimension, setting the stage for the ultimate confrontation against the demon progenitor and his Upper Ranks. Unlike previous arcs, which were sometimes adapted into compilation films or TV seasons, the Infinity Castle arc’s scale and dramatic pacing necessitate a full-length feature film adaptation, similar to the groundbreaking Mugen Train movie.
Directed by Haruo Sotozaki and animated by the acclaimed studio ufotable, with Akira Matsushima serving as Chief Animation Director and Character Designer, the film is poised to deliver a visually stunning and emotionally resonant experience. The music, composed by Yuki Kajiura and Go Shiina, known for their evocative scores, will undoubtedly elevate the on-screen drama. The new trailer itself, released on June 28, 2025, during a re-broadcast of Demon Slayer – Kimetsu no Yaiba – The Movie: Mugen Train on Fuji TV, has offered fans a tantalizing glimpse into the film’s grandeur and intense battles.
A Symphony of Stars: Aimer and LiSA’s Return
The announcement that both Aimer and LiSA will be performing the theme songs for the Infinity Castle film has ignited immense enthusiasm among the fanbase. Both artists have become synonymous with the Demon Slayer anime, lending their powerful vocals and distinctive styles to some of its most iconic musical moments. Their return for this climactic cinematic trilogy underscores their profound connection to the series and their ability to capture its essence through song.
LiSA, a powerhouse in the anime music scene, has been an integral part of the Demon Slayer journey since its inception. Her explosive hit “Gurenge” served as the first opening theme for the inaugural season, becoming a cultural phenomenon that transcended anime fandom. She further captivated audiences with “Homura,” the deeply emotional theme song for Demon Slayer: Kimetsu no Yaiba – The Movie: Mugen Train, which garnered numerous accolades and cemented her status as a crucial voice for the franchise. LiSA also contributed “Akeboshi” and “Shirogane” as the opening and ending themes, respectively, for the television adaptation of the Mugen Train Arc. For Infinity Castle, LiSA delivers the song “Zankoku no Yoru ni Kagayake,” translated as “Shine in the Cruel Night,” a title that perfectly encapsulates the dark yet hopeful tone of the impending final battle. Her continued involvement is a testament to her deep understanding of the series’ emotional core and her unparalleled ability to translate it into music.
Joining LiSA is Aimer, another celebrated vocalist whose distinct, husky voice has lent immense gravitas to various anime productions. Aimer made her indelible mark on Demon Slayer with her contributions to the Entertainment District Arc, performing the electrifying opening theme “Zankyosanka” and the poignant ending theme “Asa ga Kuru.” These tracks resonated deeply with fans, highlighting her versatility and emotional range. For the Infinity Castle film, Aimer will perform “Taiyō ga Noboranai Sekai,” or “A World Where the Sun Never Rises.” This title evokes the desperate struggle against the demons, whose very existence thrives in darkness, and promises a song filled with the dramatic tension and profound themes characteristic of the series.
Both “Taiyō ga Noboranai Sekai” by Aimer and “Zankoku no Yoru ni Kagayake” by LiSA are scheduled for release on global streaming platforms on July 18, 2025, coinciding with the film’s Japanese theatrical debut. This synchronized release ensures that fans worldwide can immerse themselves in the new musical landscape of the Infinity Castle arc as soon as the film arrives.
Global Release and Anticipation
The first film in the Demon Slayer: Kimetsu no Yaiba Infinity Castle trilogy is set to premiere in Japan on July 18, 2025. The enthusiasm extends globally, with Aniplex aiming for an unprecedented international rollout in over 150 countries and regions. Crunchyroll and Sony Pictures Entertainment are spearheading the global distribution, ensuring that fans across the world will have the opportunity to witness this epic conclusion on the big screen.
The North American release, covering the United States and Canada, is slated for September 12, 2025, and will include screenings in IMAX and other premium large formats. The film will be available in both its original Japanese with English subtitles and a newly produced English dub, catering to diverse audience preferences. Other international territories will see staggered releases beginning in August, with countries like Thailand, Hong Kong, Malaysia, Singapore, Indonesia, and Vietnam receiving the film in mid-August. European territories such as the UK, Spain, Germany, and France will follow in September. This ambitious release schedule reflects the immense global popularity of the Demon Slayer franchise and the high anticipation for its grand finale.
The Infinity Castle films are not merely an adaptation; they represent the culmination of Tanjiro’s arduous journey, the Demon Slayer Corps’ relentless fight, and the final confrontation that will determine the fate of humanity. With the powerful voices of Aimer and LiSA once again intertwining with the narrative, coupled with ufotable’s masterful animation, the first Infinity Castle film is poised to be a monumental cinematic event that will leave an enduring mark on anime history.
