The thing about That Time I Got Reincarnated as a Slime Season 4 is that it shouldn't have worked on paper — and it does. 8bit ships April 3, 2026, ongoing run, and the storyboard reel that leaked alongside the announcement is the reason this one's getting watched.
The setup
Demon Lord Rimuru's dream of creating an alliance between humans and monsters takes a step closer to being realized. As Tempest continues to prosper, Granville Rozzo and his granddaughter, Maribel Rozzo, clash with Demon Lord Rimuru over their plan to protect mankind by ruling over them. Meanwhile, in El Dorado, Demon Lord Leon works toward goals of his own. The awakening of a new Hero draws near! (Source: Crunchyroll) It's the kind of premise that sounds tidy in two sentences and gets weirder on screen — in a good way. Stick around past the cold open.
Production notes
Production sits at 8bit; Lantis, Kodansha, Magic Capsule handle the committee. The studio's track record on adjacent material is the reason fans of the source went from cautious to optimistic the moment the staff list dropped.
Calendar slot
Fridays at 23:00 (JST). Ongoing run, episode count TBC. Same-day simulcast windows are on the usual Western streamers — check your local Crunchyroll, HIDIVE, or Hulu listing for the timed slot.
The case for it
17,962 viewers have it at 8.13. Read between the lines: that's not a niche audience, that's broad pickup with steady reception. Worth the time. The season has louder names; this is the one you'll be quoting in August.