That Time I Got Reincarnated as a Slime Season 4｜April 2026 Release with Epic 5-Cour Project
On December 19, 2025, the long-awaited major news for global anime fans was officially unveiled! During the official "TV Anime 'That Time I Got Reincarnated as a Slime' Season 4 Major Announcement Livestream," information about the sequel to this super-popular isekai anime was announced.
This is not just a renewal announcement but an unprecedented large-scale production project. This article compiles the broadcast time for 'That Time I Got Reincarnated as a Slime' Season 4, its astonishing episode count scale, and the new antagonists and core plot that will appear.
Season 4 Will Be Presented in a Grand "Full 5 Cours" Format
According to the latest special video released by the official source, 'That Time I Got Reincarnated as a Slime Season 4' is confirmed to officially begin airing in April 2026.
What shocked fans the most is the production scale this time. Unlike the previous half-year series format, the official announcement states that Season 4 will be a super-large-scale project consisting of "a full 5 cours":
- Initial Broadcast Schedule: Starting from April 2026, the first 2 cours (half a year) will be broadcast consecutively.
- Subsequent Plan: The remaining cours are expected to be released gradually in a split-cour format.
In this brand new special video produced by animation studio 8bit, Rimuru's best partner—the Great Sage—personally announced this news, and Rimuru's surprised expression has also become a hot topic among fans.
Season 4 Plot Preview: The Conspiracy of the Russel Clan and the Awakening of a New Hero
As the Monster Federation successfully holds its Founding Festival and establishes diplomatic relations with various countries, Rimuru is dedicated to realizing a "Human-Monster Co-prosperity Sphere" where humans and monsters coexist. However, behind this prosperity lies deeper shadows. The core conflict of Season 4 will revolve around the confrontation between Rimuru and the masterminds behind the Western Nations.
The Threat of the Kingdom of Hiruterozo
The plot focus will shift to the "Five Elders" of the Kingdom of Hiruterozo. Among them, the head of the Five Elders and a former hero, Kuranberu Russel, and his granddaughter Mariabell Russel, will become the main antagonists of this season.
Kuranberu insists on using "domination" to protect humanity, viewing the rise of Rimuru and the Monster Federation as a major threat to human society. Mariabell possesses extremely high intelligence and ambition; this grandfather-granddaughter duo will orchestrate a series of conspiracies from behind the scenes.
The Movements of Demon Lord Leon and the Golden Land
Meanwhile, the Demon Lord Leon, located in the Golden Land, also begins to act for a specific purpose. As a former hero and current Demon Lord, his actions will influence the world situation.
The Awakening of a New Hero
Amidst the intersecting thoughts of humanity's protectors and the Demon Lords, the preview mentions that "a hero is about to awaken." This will be a key variable that influences the course of the battle. Holding onto an unwavering belief, Rimuru will be forced to face political and military wars more troublesome than ever before.
Bonus: Latest Information on the Movie 'The Scarlet Bond'
In addition to the Season 4 TV anime news, the official source also simultaneously released the second wave of advance ticket information for the new movie 'That Time I Got Reincarnated as a Slime the Movie: The Scarlet Bond'. For fans wanting to quench their thirst before the anime airs in April 2026, this movie is absolutely not to be missed.
Frequently Asked Questions (FAQ)
Q: When will 'That Time I Got Reincarnated as a Slime' Season 4 air? A: 'That Time I Got Reincarnated as a Slime' Season 4 is confirmed to officially begin airing in April 2026.
Q: How many episodes will Season 4 have in total? A: The official announcement states that Season 4 will be produced in a "full 5 cours" format, with the first wave consisting of 2 consecutive cours.
Q: Who are the main antagonists of Season 4? A: The main antagonists of Season 4 are Kuranberu Russel and Mariabell Russel of the Russel clan.
Conclusion
'That Time I Got Reincarnated as a Slime' Season 4 returns with a "full 5 cours" format, proving the production committee's extremely high regard and confidence in this IP. Starting from April 2026, we will witness how Rimuru deals with the cunning Russel clan. Please stay tuned for the subsequently released voice cast and specific broadcast dates!