That Time I Got Reincarnated as a Slime Season 4: Release Date, Trailer & Epic Five‑Cour Arc

If you’ve been patiently waiting for Rimuru to make his grand return, good news: your patience is about to pay off. “That Time I Got Reincarnated as a Slime” Season 4 officially has a premiere date, a full trailer, and enough hype to make even the most casual anime fan sit up straight. Circle April 3, 2026 on your calendar, because the Slime is back, and he’s bringing chaos with him.

Where to Watch “That Time I Got Reincarnated as a Slime” Season 4

Let’s get the big stuff out of the way first. Season 4 premieres on April 3, 2026, airing weekly on Japanese television. For international fans, Crunchyroll will stream new episodes across North America, Central America, South America, Europe, Africa, Oceania, the Middle East, and CIS. So basically, if you have internet access and a Crunchyroll subscription, you’re covered.

The new season picks up right where Season 3 left off, which wrapped in September 2024. Yes, it’s been a while. No, we haven’t forgotten. And yes, the wait has clearly been worth it.

Why Season 4 of “Slime” Is Unlike Anything That Came Before It

Here’s where things get genuinely exciting. Season 4 isn’t just another standard 12-episode run. The new season is confirmed for a massive five-cour structure, making it one of the most ambitious anime productions in recent memory. The first two cours will air back-to-back during the Spring and Summer 2026 anime windows, with the remaining three cours set to follow in 2027 and beyond.

For fans of the franchise, this is a big deal. It signals that Studio Eightbit and the production team aren’t cutting corners. They’re going all in on this arc, and given what the source material has in store, that commitment is entirely warranted.

What the Season 4 Trailer Reveals About the Story

The official trailer gives fans a lot to unpack. According to Crunchyroll’s official synopsis, Demon Lord Rimuru’s dream of creating an alliance between humans and monsters is closer than ever to being realized, but not everyone is on board with that vision. New characters Granville Rozzo and his granddaughter Maribel Rozzo are set to clash directly with Rimuru over their own plan to protect humanity, one that involves ruling over it. Because apparently, “peace through domination” and “peace through unity” are not the same thing. Who knew?

Meanwhile, Demon Lord Leon is doing his own mysterious scheming over in El Dorado, which is par for the course when it comes to Demon Lords. The trailer also teases the awakening of a new Hero, a development that will almost certainly complicate absolutely everything. Large-scale battles, political intrigue, and some genuinely jaw-dropping key visuals round out what looks like the most plot-dense season of Slime yet.

Both Veldora and Hinata appear in the trailer, which alone is enough to generate a significant amount of excitement from longtime fans.

The Theme Songs Chosen for Season 4 Are Excellent

The music choices for this season deserve their own spotlight. The opening theme, “Esoragoto,” is performed by Eir Aoi, whose high-energy delivery fits perfectly with the rising tension the show is building toward. The ending theme, “Katsubo,” comes from CiON and promises the kind of emotionally resonant closer that will hit harder after a particularly brutal episode. Both artists are well-established in the anime music world, and their involvement here only raises expectations further.

The Slime Movie You Need to Watch Before Season 4 Starts

Before jumping into Season 4, there’s actually a movie to consider. “That Time I Got Reincarnated as a Slime: Tears of the Azure Sea” is heading to U.S. and Canadian theaters on May 1, 2026, shortly after the new season’s debut in Japan. Directed by Yasuhito Kikuchi at Studio Eightbit, the film features an original story written by series creator Fuse, one that has never appeared in either the anime or light novels. It will be offered in both Japanese audio with subtitles and an English dub.

This film isn’t just a side story to skip over. It’s designed to build momentum heading into the larger Season 4 narrative, and given that Fuse wrote it personally, treating it as supplementary content would be a mistake.

Why “Slime” Season 4 Is Already One of Spring 2026’s Most Anticipated Anime

“That Time I Got Reincarnated as a Slime” has grown into one of the biggest isekai franchises on Crunchyroll, earning that reputation through three successful TV seasons, two feature films, a spinoff series, and multiple OVA specials. Season 4 enters the story at a genuinely pivotal moment. Both the manga and the original light novel series have now concluded their runs, meaning the anime is adapting some of the most significant arcs Fuse ever wrote. The stakes have never been higher, the world-building has never been more expansive, and Rimuru’s belief in peaceful coexistence is about to be tested in ways that will keep viewers hooked week after week.

Spring 2026 has plenty of strong anime competing for attention. “That Time I Got Reincarnated as a Slime” Season 4 is already near the top of that list, and the April 3 premiere cannot come fast enough.