Demon Slayer: Kimetsu no Yaiba the Movie: Mugen Train is releasing tomorrow in select theatres across the US. As the movie had already released in Japan back in October and has brought in a total of ¥39.72 billion just in Japan. The box office sales as worldwide is shown as being $432.62 million and has amassed a 100% Rotten Tomatoes score. Seeing as how popular this movie is already without having the official USA release, it seems as that the box office numbers will exponentially grow throughout the weekend.