Demon Slayer: Kimetsu no Yaiba has entered its final and most anticipated arc with the release of Infinity Castle Part 1: Akaza Returns, which officially premiered in Japanese theaters on July 18. The film marks the beginning of a trilogy that will adapt the climactic battles of Koyoharu Gotoge’s bestselling manga, with the return of Akaza setting the tone for what promises to be an emotionally intense journey. Alongside the theatrical debut, the highly awaited theme songs by Aimer and LiSA have been released for streaming and are already stirring strong emotional reactions among fans.
Aimer’s hauntingly beautiful theme song, titled A World Where the Sun Never Rises, sets the emotional backdrop of the first part of the Infinity Castle saga. Accompanied by cover art that features the beloved character Shinobu, the track captures the eerie and heartbreaking beauty that fans have come to associate with the darker moments of the Demon Slayer universe. Aimer’s voice continues to carry the weight of grief and hope in perfect harmony, offering a melody that stays with you long after the credits roll.
On the other side of the emotional spectrum, LiSA returns with the electrifying Shine in the Cruel Night. Her iconic energy brings fire and determination to the screen, and the cover art for the song features Giyu Tomioka, whose stoic presence complements the intensity of the theme. As one of the most recognizable voices in anime music, LiSA once again proves why her work continues to resonate with millions of fans around the world.
The film’s runtime has been confirmed at 155 minutes, making it the longest theatrical release in the franchise so far. Animated by ufotable, known for its meticulous detail and dazzling fight choreography, the movie was released in more theaters across Japan than any previous Demon Slayer title. The scale and ambition of this trilogy reflect the significance of the Infinity Castle arc, where the stakes are higher than ever and the emotional payoff is bound to leave a lasting impact.
Following its domestic release, Infinity Castle Part 1: Akaza Returns is slated for international theatrical release between August 14 and September 25, 2025. The anticipation is already building in overseas markets, with fans eager to witness the next phase of the Demon Slayer saga on the big screen.
The film not only brings back one of the series’ most complex and tragic villains but also signals the beginning of the end for many of its central characters. As the story hurtles toward its inevitable conclusion, the combination of breathtaking animation, character-driven storytelling, and emotionally rich music ensures that this trilogy will be remembered as one of anime’s most powerful finales.
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