Demon Slayer Movie Run Time - How Long is the Mugen Train Film in Theaters? Demon Slayer Kimetsu no Yaiba movie, Mugen Train, will be out in American theaters this Friday April 23, and many anime fans are wondering how long the film’s run time is, we have the answer below. New Character Demo – “Yanfei: Legal Expertise” | Genshin Impact BridTV https://i.ytimg.com/vi/y43rmAQ-l_M/hqdefault.jpg 760961 What is the run time of the Demon Slayer movie? The Japanese version of the Demon Slayer movie had a run time of around 1 hour and 50 minutes. However, seeing we’re talking about the English American version here, the credits will be slightly longer, with both the Japanese staff and the localization staff. So in America, the movie is listed to have a run time of 1 hour and 57 minutes.