The popular isekai anime That Time I Got Reincarnated as a Slime came back for its fourth season on April 3, 2026. This new season is bigger than any before, with plans for a long run that will keep viewers watching for many months. The show follows Rimuru Tempest, a regular guy who turned into a powerful slime monster in a fantasy world. He now rules the nation of Tempest, where monsters and humans are trying to live together.
Season 4 picks up right after the big festival. Tempest is growing fast, but new problems are showing up. A new enemy named Granville Rozzo and his granddaughter Maribel Rozzo want to control humans to protect them. This puts them on a crash course with Rimuru. At the same time, other powerful demon lords like Leon are working on their own secret plans.
Season 4 Runs for Five Cours With First 24 Episodes Confirmed
The fourth season of That Time I Got Reincarnated as a Slime will run for five cours total. A cour is about three months of TV episodes. The first two cours are airing one after another without breaks. This gives fans a steady stream of new episodes from spring through fall 2026.
The first 24 episodes follow a weekly release pattern. New episodes come out every Friday. The show airs in Japan on NTV’s “Friday Anime Night” block at 11:00 PM JST. International fans can watch the same day on streaming services.
Here is the full list of confirmed episode release dates for Season 4:
April 2026
- Episode 1: New Days – April 3
- Episode 2: The Dungeon Evolves – April 10
- Episode 3: Ramiris’s Warning – April 17
- Episode 4: The Congress Dances – April 24
May 2026
- Episode 5: The Eve of Battle (delayed to May 8) – Originally scheduled for May 1
- Episode 6: The Demon Lords – May 15
- Episode 7: The Signal to Begin the Banquet – May 22
- Episode 8: On This Land Where It All Happened – May 29
June 2026
- Episode 9: Adalman, the Index Finger – June 5
- Episode 10: Demon Lords’ Banquet ~Walpurgis~ – June 12
- Episode 11: Returning from the Brink – June 19
- Episode 12: Octagram – June 26
July 2026
- Episode 13: The Nightman Cometh – July 3
- Episode 14: Episode 14 – July 10
- Episode 15: Episode 15 – July 17
- Episode 16: Episode 16 – July 24
- Episode 17: Episode 17 – July 31
August 2026
- Episode 18: Episode 18 – August 7
- Episode 19: Episode 19 – August 14
- Episode 20: Episode 20 – August 21
- Episode 21: Episode 21 – August 28
September 2026
- Episode 22: Episode 22 – September 4
- Episode 23: Episode 23 – September 11
- Episode 24: Episode 24 – September 18
Episode 5 Delay Due to Scheduling Reasons
The production team announced that Episode 5 will not air on its original date of May 1, 2026. Instead, a special recap episode will take its place. The team cited “scheduling reasons” for this change.
The production team behind the anime noted that there are “scheduling reasons” behind the choice to air a recap event instead of the planned Episode 5.
Episode 5, titled “The Eve of Battle,” will now air on May 8, 2026. This pushes back the rest of the May schedule by one week. Fans should check official sources for any other schedule changes as the season continues.
Where to Watch Season 4 Around the World
Crunchyroll is the main streaming home for That Time I Got Reincarnated as a Slime Season 4. The platform offers simulcasts, meaning new episodes become available at the same time as they air in Japan. Crunchyroll streams the show in:
- North America (United States, Canada)
- Central and South America
- Europe
- Africa
- Oceania (Australia, New Zealand)
- Middle East
- CIS territories
For viewers in India, the episode releases around 7:30 PM IST every Friday. United States viewers on the West Coast can watch at 7:00 AM PT. United Kingdom fans get the episode at 3:00 PM BST.
The service also has all three previous seasons of the show. Fans who want to catch up or rewatch can find the complete series on Crunchyroll. An English dubbed version of Season 4 has not yet been announced, but previous seasons received dubs after the subtitled versions aired.
What to Expect From This Season’s Story
Season 4 of That Time I Got Reincarnated as a Slime covers material from the light novels starting at volume 10. The story moves toward bigger conflicts. Rimuru has built Tempest into a successful nation. But success brings new attention. Powerful figures in the world see Tempest as a threat or a tool to use.
The main conflict this season involves Granville Rozzo and his plan to protect humanity by controlling it. He does not see monsters as equals. His granddaughter Maribel Rozzo has her own mysterious powers and goals. Meanwhile, the other demon lords are gathering. A new hero is also said to be waking up soon. All these events point toward a major meeting called Walpurgis, where the demon lords discuss important matters.
The first few episodes focus on Tempest dealing with its new dungeon and growing pains. Episode 1, “New Days,” showed the festival’s success and the first signs of trouble. Episode 2, “The Dungeon Evolves,” dives into how the dungeon is changing and causing unexpected problems.
More Episodes Coming After September 2026
The 24 episodes airing from April to September 2026 are only the first two parts of Season 4. Three more cours will air later. The total number of episodes for the full season could reach around 60. That would make Season 4 almost as long as the first three seasons combined.
Release dates for parts 3, 4, and 5 have not been announced yet. The team will likely take breaks between each cour. Fans should expect Season 4 to continue into 2027. This long format allows the anime to cover more of the original light novel story without rushing.
The light novel series ended in late 2024 with 23 volumes. The first three seasons of the anime covered nine volumes. Season 4 starts from volume 10. If the season really has around 60 episodes, it could get through several more volumes and bring the story much closer to the ending.
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Rimuru’s Journey Continues With Same Voice Cast
Miho Okasaki returns as the voice of Rimuru Tempest. The animation studio 8-Bit is back to produce the season. The same creative team that worked on previous seasons is in charge, keeping the look and feel consistent for longtime fans.
A second movie, That Time I Got Reincarnated as a Slime the Movie: Tears of the Azure Sea, is also coming. It will open in theaters worldwide starting April 28, 2026 in some countries and May 1, 2026 in the United States and United Kingdom. The movie will tell a new story separate from the main season plot.
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