The highly anticipated first film in the Demon Slayer: Kimetsu no Yaiba – Infinity Castle trilogy has unveiled its latest trailer, confirming that renowned artists Aimer and LiSA will contribute the theme songs. This cinematic event, titled Demon Slayer: Kimetsu no Yaiba Infinity Castle – Akaza Sairai (The Return of Akaza), is set to delve into the penultimate arc of Koyoharu Gotouge’s globally acclaimed manga, commencing the series’ climactic final battle.
The new trailer, which rapidly garnered over 40 million views within 24 hours of its release on June 28, 2025, has intensified fan excitement for the upcoming three-part film saga. The first instalment is scheduled to premiere in Japan on July 18, 2025, before embarking on a staggered global theatrical release, starting August 12, 2025, in Southeast Asia. Fans in the United States, Canada, the United Kingdom, and India can anticipate screenings beginning September 12, 2025, with both Japanese audio and English-dubbed versions available in IMAX and other premium large formats.
Musical Maestros Return
The choice of Aimer and LiSA to craft the film’s theme songs underscores their profound connection to the Demon Slayer franchise’s musical identity. Aimer will perform “A World Where the Sun Never Rises” (太陽が昇らない世界), while LiSA will contribute “Shine in the Cruel Night” (残刻の夜に輝け). Both songs are slated for global streaming release on July 18, 2025, coinciding with the film’s Japanese debut.
LiSA has become virtually synonymous with the Demon Slayer anime, having delivered some of the series’ most iconic tracks. Her electrifying “Gurenge” served as the opening theme for the first season, becoming a global phenomenon and one of Japan’s best-selling digital singles. She further cemented her legacy with “Homura,” the poignant theme song for Demon Slayer: Kimetsu no Yaiba – The Movie: Mugen Train, which earned her the Grand Prix at the 62nd Japan Record Awards.
Aimer, equally celebrated, made her indelible mark on the franchise with “Zankyosanka,” the powerful opening theme for the Entertainment District Arc, which achieved over 400 million streams on Billboard JAPAN charts. Her “Asa ga Kuru” also served as an ending theme for the same arc. The return of these two vocal powerhouses signals a continuation of the high musical standard fans have come to expect, promising to infuse the Infinity Castle saga with emotional depth and intensity.
The Descent into the Infinity Castle
The Infinity Castle arc represents a pivotal and high-stakes turning point in the Demon Slayer narrative. It directly follows the events of the Hashira Training Arc, plunging Tanjiro Kamado and the elite Demon Slayer Corps into a surreal, dimension-altering labyrinth controlled by the Demon King, Muzan Kibutsuji.
This extraordinary setting, characterized by its shifting rooms, halls, and warped gravity, presents an unprecedented challenge as the Demon Slayers face Muzan and his most formidable Upper Rank demons. The trailer teases several highly anticipated confrontations, including Tanjiro and Giyu Tomioka’s battle against Akaza, the demon responsible for the death of Flame Hashira Kyojuro Rengoku in the Mugen Train film. Other key encounters hinted at include Shinobu Kocho facing the demon who killed her sister and Zenitsu Agatsuma confronting his former classmate, Kaigaku, who has embraced demonhood.
This trilogy of films is set to faithfully and expansively adapt the final battle portion of the manga, leading to the ultimate conclusion of Tanjiro’s quest to avenge his family and cure his sister, Nezuko. The intense battles, strategic maneuvers, and long-awaited revelations within the Infinity Castle serve as the definitive stage for the Demon Slayer Corps’ final stand against the demon scourge.
Production Excellence and Anticipation
Under the direction of Haruo Sotozaki and produced by the acclaimed studio Ufotable, known for its breathtaking animation quality throughout the Demon Slayer series, the Infinity Castle films are poised to deliver a visually stunning and emotionally resonant cinematic experience. The decision to adapt this climactic arc into a trilogy of feature films, rather than a single movie or a television season, underscores the narrative’s density and importance, promising a comprehensive and uncompromised retelling of the manga’s conclusion.
As the Demon Slayer saga approaches its grand finale, the return of Aimer and LiSA, combined with Ufotable’s masterful animation and the compelling narrative of the Infinity Castle arc, builds immense anticipation for what is set to be a landmark event in anime history.
