After the schemes and faction clashes that defined That Time I Got Reincarnated as a Slime Season 3, the series is gearing up for what promises to be its most ambitious chapter yet. The first key visual and promotional video for Season 4 have officially dropped, and they pull no punches about the conflict ahead.
The TV anime That Time I Got Reincarnated as a Slime Season 4 is confirmed to begin broadcasting on Friday, April 3. Alongside the premiere date, the production team has released the first key visual, the first PV, and full theme song details.
What the New Trailer Reveals
The first key visual places three characters front and center: Rimuru, Mariabell, and Yuuki. Here's the thing, this trio is not a coincidence. The visual is designed to foreshadow the direct confrontations that have been building across multiple seasons, including long-standing grudges that trace all the way back to the series' earliest arcs.
The accompanying PV offers fans a first look at Rimuru stepping into a new chapter, one focused on his continued mission to build a realm of coexistence between humans and monsters. The tone of the footage suggests the season will balance large-scale political conflict with the core idealism that has driven Rimuru since the beginning.
Theme song details are also confirmed:
- Opening theme: Performed by Eir Aoi
- Ending theme: Performed by CiON
Both artists bring strong anime credentials to the project. Eir Aoi is widely recognized for her work on major anime titles, making her a fitting choice for a series of this scale.
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The April 3 premiere date places Tensura Season 4 in the Spring 2026 anime season, one of the most competitive broadcast windows of the year.Why This Season Matters
Season 3 spent considerable time expanding the world's political landscape, introducing new factions and deepening the rivalry between Rimuru's growing nation and those who oppose it. Season 4 appears to be the payoff for that groundwork.
The inclusion of Mariabell and Yuuki in the key visual is particularly significant for fans who have followed the manga. These characters sit at the center of some of the most consequential storylines in Fuse's original light novel series, and their prominent placement suggests the anime adaptation is heading into major narrative territory.
What most players, or in this case viewers, miss is how much of Season 4's drama is rooted in decisions made as far back as Season 1. The key visual is essentially a promise that those threads are finally being pulled tight.
A Long Road to April
That Time I Got Reincarnated as a Slime began as a web novel by Fuse before being adapted into a light novel series with illustrations by Mitz Vah, and eventually the manga and anime adaptations that built its global fanbase. The anime has been produced by 8-bit studio across its run.
The series has consistently ranked among the most popular isekai properties in recent years, and Season 4 arrives with considerable anticipation following the story beats left unresolved at the end of Season 3.
With a confirmed air date, a striking key visual, and two established theme song artists on board, Tensura Season 4 is positioned as one of the headline anime releases of Spring.
Source: Times Abema Tv
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Frequently Asked Questions (FAQs)
When does That Time I Got Reincarnated as a Slime Season 4 premiere?
Season 4 begins broadcasting on Friday, April 3, placing it in the Spring anime season.
Who performs the opening and ending themes for Season 4?
The opening theme is performed by Eir Aoi, and the ending theme is performed by CiON.
Which characters appear in the Season 4 key visual?
The first key visual features Rimuru, Mariabell, and Yuuki, hinting at the direct confrontations central to the new season's story.
