Demon Slayer: Infinity Castle's Tanjiro gritting his teeth and holding his sword up.
Demon Slayer: Infinity Castle is finally set to officially release this Friday, September 12, in the United States, after many long months of anticipation. In preparation for the theatrical film's release, many fans are binging the entire Demon Slayer anime series to refresh their minds before the first installment in the Infinity Castle trilogy hits theaters.
Others are interested in seeing Infinity Castle but overwhelmed by Demon Slayer's four anime seasons, and one film . Although the entirety of Demon Slayer is certainly worth watching, not every episode is necessary to understand the Infinity Castle movie. This viewing schedule is the perfect way to get caught up as quickly as possible. Pressed for Time? Watch the Demon Slayer: Mugen Train Movie First One of the most important parts of the Demon Slayer franchise, that will be crucial for comprehending major moments in the Infinity Castle film, is the Mugen Train arc. The Mugen Train arc was released in both a televised anime format and a theatrical film format. The movie first debuted in April 2021, with the anime coming shortly afterward. There are some key differences between the Mugen Train movie and anime. The movie has a one hour and 57 minute runtime, while the anime arc consists of seven individual episodes, each between 21 and 26 minutes each. It would take almost three hours to watch the entire Mugen Train anime arc, slightly longer than the film. For someone on a time crunch, the Mugen Train movie may be the best bet, since it covers all the essential plot points with a shorter overall runtime. The anime arc is more extensive and detailed, but some of the content includes filler scenes, or post-credits segments like"Taisho Era Secrets," which are not relevant to the main plot. The Mugen Train movie became the highest-grossing anime film for a reason; it is one of Demon Slayer's best, and most unskippable, arcs. The main characters, Tanjiro, Zenitsu, and Inosuke, are all featured prominently in both Mugen Train and Infinity Castle, so watching the Mugen Train film is a fantastic way to learn about their bond and past achievements. The plot of Mugen Train also focuses heavily on Akaza, the Upper Rank Three demon, who becomes a major villain in the Infinity Castle movie. One of Infinity Castle's biggest battles is Tanjiro and Water Hashira, Giyu Tomioka, vs. Akaza, so some familiarity with the villain will make their Infinity Castle clash more fulfilling. Demon Slayer’s Third Season, the Swordsmith Village Arc, Is Also a Must-Watch Demon Slayer's third anime season, the Swordsmith Village arc, also pertains to Infinity Castle. The first episode of this season features an Upper Ranks Meeting between Lord Muzan and the Upper Rank demons. Specifically, Muzan, the main villain of the Demon Slayer franchise, Akaza, the Upper Rank Three, and Doma, the Upper Rank Two, all play major roles in Infinity Castle. Two of Infinity Castle's most prominent fight scenes include Akaza and Doma, so becoming acquainted with these characters' personalities and backstories will help viewers better enjoy the Infinity Castle movie. Those who do not have time to watch the entire 11-episode season can stick with the beginning of episode 1, which focuses on the Upper Rank demons and their meeting. The rest of the Swordsmith Village arc of the anime is not required viewing, but does shed light on Tanjiro's growth as a demon slayer since his humble beginnings, as well as delving into the pasts of important members of the Hashira like Mitsuri Kanroji and Muichiro Tokito, who appear heavily in later installments of the Infinity Castle trilogy. Demon Slayer's To the Hashira Training Arc Segues Into the Start of Infinity Castle Demon Slayer's most recent anime arc, To the Hashira Training, introduces all nine current Hashira, revealing their powers, attitudes, and ambitions. All of these characters show up again in the series' final two arcs, which will be portrayed in the trilogy of movies, so this season of the anime is one of the best to watch before Infinity Castle. This fourth anime season of Demon Slayer is one of the anime's shorter seasons, at only eight episodes long, so it would only take about four hours to watch all the episodes. If ample time is not available to watch eight episodes, the last episode of the season,"The Hashira Unite," should be prioritized because it leads into Infinity Castle. Demon Slayer season four's final episode chronicles the Hashira finally teaming up to take on Lord Muzan, the progenitor of demons. The group meets at the Ubuyashiki Mansion, where Muzan converses with Kagaya Ubuyashiki, leader of the Demon Slayer Corps. After a tense battle, the cast fall into the Infinity Castle one-by-one, which is where the Infinity Castle movie begins. Watching the Mugen Train movie, the first episode of the To The Swordsmith Village arc, and the final episode of the To The Hashira Training arc would take about 3.5 hours, which is certainly doable in one day and hits on all the most vital characters, conflicts, and key events that will arise in Infinity Castle. For fans who have more time before they plan to watch the Infinity Castle film, it might be worth watching both the Swordsmith Village and To the Hashira Training arcs in their entirety. These seasons highlight Muzan and the Upper Rank demons' growing evil towards humanity and the Hashira's steady quest to stop the atrocities they insist on causing. How Long Would It Take to Watch All of Demon Slayer in Order? Especially committed fans may wish to watch all of Demon Slayer before seeing Infinity Castle, either as a refresher or perhaps for the first time ever. Since Demon Slayer is fairly lengthy, some may wonder: exactly how long would it take to watch the entire series? The first season of Demon Slayer is 26 episodes, which would take approximately 10 hours total to watch. The Mugen Train movie is an hour and 57 minutes, while the Mugen Train anime arc is about three hours. Both the Entertainment District arc and the Swordsmith Village arc would take about 5 hours each to watch. The final season, To the Hashira Training, is about four hours long. All together, to watch all of Demon Slayer's anime arcs in order, fans must spend between 26 and 27 hours, depending on whether they opt for the Mugen Train movie or anime. This viewing schedule covers an entire day, but it is possible, especially split over several days. Whether one only has a couple of hours to binge the essential parts of Demon Slayer before the film, or has many hours to enjoy the series fully, the Infinity Castle movie will still be incredibly enjoyable with even basic knowledge of the series' main heroes, villains, and major events that can be gained through just a few episodes. Where Is the Best Place to Watch All of Demon Slayer? Demon Slayer is available to watch in many different places, but the full anime can be found most easily on Crunchyroll. Crunchyroll hosts all four anime seasons of Demon Slayer, the Mugen Train movie, the Mugen Train anime arc, and some extras, like five TV compilation specials of various Demon Slayer moments. Many other streaming services also include Demon Slayer in their lineup, including Hulu, Disney+, Amazon Prime Video, Netflix, YouTube TV, Apple TV, and Fandango at Home. These streaming options cost various amounts, but the first season of Demon Slayer is available for free on Crunchyroll. When Will Demon Slayer Be Available in Theaters in the United States? Demon Slayer: Infinity Castle's official US release date is not until Friday, September 12, but many fans have already seen the momentous film early, or will soon. Crunchyroll users who are subscribed to the Mega or Ultimate Fan tiers of membership were able to purchase advance screening tickets for a September 9 showing, three days before the film's official release. Many US theaters are also offering early showings on Thursday, September 11, but these screenings will likely sell out fast. Worldwide, Infinity Castle tickets have often sold out instantly. In Japan, tickets sold out in less than ten minutes, and in Taiwan, fans waited in line for 5–9 hours to purchase Demon Slayer tickets. Demon Slayer: Infinity Castle's US Release Could Make it the #1 Anime Movie Demon Slayer: Infinity Castle has already achieved many major milestones, including having Japan's best opening weekend for a film in history. Once Infinity Castle finally reaches US theaters, it will likely shatter even more records, potentially even beating Mugen Train and becoming the new highest grossing anime movie of all time. Infinity Castle is the first of three films that will conclude Demon Slayer's anime, with the next two installments in the trilogy predicted to release in 2027 and 2029. Before it has debuted in every country, Demon Slayer: Infinity Castle has made anime history, and that trend will likely continue when the final two movies are unveiled in the future. Your Rating close 10 stars 9 stars 8 stars 7 stars 6 stars 5 stars 4 stars 3 stars 2 stars 1 star Rate Now 0/10 Leave a Review Your comment has not been saved Like Follow Followed Demon Slayer: Kimetsu no Yaiba Infinity Castle G Animation Action Fantasy Thriller 39 8.8/10 Release Date July 18, 2025 Runtime 155 Minutes Director Haruo Sotozaki, Hikaru Kondo Writers Koyoharu Gotouge, Hikaru Kondo Cast See All
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