I saw the movie Demon Slayer: Infinity Castle (2025) yesterday. This is a movie about the Demon Slayer anime/manga. Most other anime movies I am familiar with are low budget OVA productions that are made for TV. Essentially they target hardcore fans who are going to watch anything from the franchise, even if its garbage. Low budget, low quality, low viewers, low revenue, and disappointment.
Demon Slayer is the opposite. It’s a high budget movie intended for commercial theaters. It was the 7th highest box office movie in 2025, and set a record for the highest grossing international film of all time in US theaters. It set a record for the highest first day box of all time in Japan. It’s almost universally praised, with a 98% rating on Rotten Tomatoes from both critics and viewers. It’s the ~50th highest rated major commercial theater release movie of all time on IMDB. It’s also rated R – apparently targeting adult viewers, rather than children.
I’m puzzled how the movie I watched could align with the outcome described above. Unlike typical OVA anime movies that are largely independent from the anime/manga plot, the plot of the Demon Slayer movie cannot be well understood without having watched the previous 63 episodes of the anime. Without having watched the anime, I’d expect typical viewers to have no idea what is going on, greatly limiting the portion of potential viewers who would enjoy the movie.
Perhaps being familiar with the plot doesn’t really matter, as the plot makes little sense. That’s probably not why people watch the movie. There is also little character development, and several of the most popular characters from the series don’t appear or are only shown for a few seconds/minutes to indicate that they are running somewhere within the castle. Instead the bulk of the 2 hour, 30 minute movie relates to a single battle between 2 demon slayers and the 4th highest ranked demon. With several high ranked demons remaining , it opens the door to Demon Slayer: Infinity Castle: Part 2/3/4 movies.
Where the movie does shine and what may be the key reason for its success is how breathtakingly visually impressive the movie is. There was so much surround sound occurring in so many directions that the movie repeatedly overloaded my speakers, causing them to auto shut off for a few minutes. The movie sets the bar for what is possible in anime, and perhaps that’s the primary reason people view and enjoy it.
While I was impressed with the cinematography, choreographed fight scenes, surround sound quality, … and don’t regret watching the movie; overall I thought it was just okay. I need a more interesting and meaningful plot, rather than just a lot of action and visuals. My personal input was much like my overloaded speakers – too much rapid action, lights, sounds… for too long. I need more breaks in between. I now better understand the common anime warning about triggering epileptic seizures. An example portion of the fight that composes the bulk of the movie is below. If you don’t want to see that continue for a very long period, you probably won’t like the movie.