For Demon Slayer: Infinity Castle Part 1 (the first movie in the new trilogy), there isn’t an exact streaming date yet, but the current reporting says it’s expected to arrive on streaming sometime in 2026 , with a likely window of June to September 2026 on Crunchyroll first. Other coverage notes that the film is being positioned as a theatrical release first, with streaming following later rather than day-and-date.

What’s known now

  • No official exact streaming date has been announced yet.
  • The strongest current estimate is mid-to-late 2026.
  • Crunchyroll is the most likely first streaming home, based on the reporting available.

If you meant a different movie

If by “movie 1” you meant Mugen Train , that one has already streamed on major services in many regions, and guides to where to watch it are available.