That Time I Got Reincarnated as a Slime — Season 4
Ascend into your true form.
About this season
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!
Episodes (24)
1. New Days
9.3Aired 3 April 2026 • 24 min
Tempest is thriving after the success of its festival, but unexpected trouble has arisen with the new dungeon.
2. The Dungeon Evolves
9.5Aired 10 April 2026 • 24 min
Rimuru and his trusted companions discuss ideas for improving the dungeon.
3. The Avatar Team Is Formed
8.4Aired 17 April 2026 • 24 min
Rimuru, Ramiris, Veldora, and Milim work on perfecting their avatars before facing Team Green Fury.
4. Invitation
8.5Aired 24 April 2026 • 24 min
The Council of the West deliberates on whether to grant membership to Tempest.
5. The First Step
8.5Aired 8 May 2026 • 24 min
Rimuru attends the meeting that will determine Tempest's membership in the Council of the West.
6. The Council of the West
9.0Aired 15 May 2026 • 24 min
A list of unreasonable demands from the Council makes Rimuru realize that a deeper plot is in motion.
7. The Mastermind's Identity
9.0Aired 22 May 2026 • 24 min
An interrogation of Prince Elric's would-be shooter reveals who's pulling the strings behind the Council.
8. The Groundwork of Greed
8.3Aired 29 May 2026 • 24 min
Glenda reveals all she knows about the Council and the Rozzos, and Rimuru prepares to inspect ancient ruins.
9. Investigating the Ruins
8.7Aired 5 June 2026 • 24 min
The investigation of the ancient ruins of Amrita begins.
10. The Master of Greed
9.0Aired 12 June 2026 • 24 min
Rimuru and Mirabel come face-to-face at last in the ancient ruins.
11. Milim's Friend
9.5Aired 19 June 2026 • 24 min
Rimuru helps Milim confront the Chaos Dragon, a corrupted form of the baby dragon that was once her friend.
12. Tempest Evolves
8.5Aired 26 June 2026 • 24 min
Rimuru shares his plans for Tempest's future, including a new system of government and Council representation.
13. New Companions
5.5Aired 3 July 2026 • 24 min
Ramiris and Veldora are feeling overworked, so they ask Rimuru to find assistants for them.
14. The Black Numbers
7.0Aired 10 July 2026 • 24 min
Diablo returns with new demon subordinates to add to Tempest's ranks.
15. An Unsettling Feeling
Aired 17 July 2026 • 24 min
As Tempest continues to grow and evolve, the Moderate Harlequin Alliance approaches Demon Lord Leon.
16. Gran, the Hero of Dawn
Aired 24 July 2026
17. Episode 17
Aired 31 July 2026
18. Episode 18
Aired 7 August 2026
19. Episode 19
Aired 14 August 2026
20. Episode 20
Aired 21 August 2026
21. Episode 21
Aired 28 August 2026
22. Episode 22
Aired 4 September 2026
23. Episode 23
Aired 11 September 2026
24. Episode 24
Aired 18 September 2026