That Time I Got Reincarnated as a Slime Season 4

転生したらスライムだった件第4期 (Tensei shitara Slime Datta Ken 4th Season)

9.0(1)

OtakuDen

8.1(33,543)

MAL Score

Ranked #592

Popularity #1267

Action
Comedy
Fantasy
Isekai
Reincarnation

Duration: 24 min
Aired: Apr 3, 2026 to ?
Status: Currently Airing

Synopsis

Demon Lord Rimuru moves closer to his vision of uniting humans and monsters as the nation of Tempest continues to flourish. But that growing influence invites confrontation: Granville Rozzo and his granddaughter, Maribel Rozzo, oppose Rimuru as they pursue their own idea of “protecting” humanity—by placing it under their rule.

Far away in El Dorado, Demon Lord Leon advances plans that don’t necessarily align with Tempest’s future. With tensions rising across factions, the long-anticipated awakening of a new Hero approaches.

Otaku Consensus

Season 4 is landing as a confident continuation rather than a reinvention: Naokatsu Tsuda’s direction and 8bit’s steady presentation preserve the series’ appeal in kingdom management, ensemble maneuvering, and polished fantasy spectacle. The strongest praise centers on smooth progression, character-driven statecraft, and animation that fans have singled out as especially sharp in key moments. The genuine knock is pacing: early episodes are widely described as slow or overly chill, making this a season that rewards viewers already invested in Tempest’s political machinery.

Why You Should Watch

Watch Season 4 if you come to Slime for the spreadsheet pleasures of fantasy nation-building: councils, factional leverage, magic systems, and a monster society that feels administered rather than merely adventured through. It scratches the same strategic itch as Log Horizon, but with the warmer comic tempo and power-fantasy confidence that Slime has built over multiple seasons; compared with Overlord, its politics land less as cruelty and more as negotiated infrastructure. The AniList tag profile tells the truth: Kingdom Management outranks standard battle tags, while Dungeon, Demons, Medieval politics, swordplay, and spearplay keep the setting from becoming pure conference-room anime. If you want isekai escalation without grimdark exhaustion, and you do not mind a measured opening stretch, this is the season tuned for you.

Key Characters

R
Rimuru Tempest(VA: Miho Okasaki)
Rimuru remains compelling because fans read them less as a lone power fantasy lead and more as an administrator-protagonist whose charisma is tested through policy, alliances, and delegation.
G
Granville Rozzo
Granville’s appeal is political menace: he represents the kind of antagonist whose power comes from institutions, influence, and an absolutist definition of human protection.
M
Maribel Rozzo
Maribel stands out as a dynastic player whose presence shifts conflict away from simple battlefield strength and toward inherited ideology and control.
L
Leon
Leon is framed as a long-game Demon Lord, interesting less for immediate confrontation than for the strategic distance his El Dorado agenda creates from Tempest.

What Makes It Stand Out

1
AniList’s strongest tag for the season is Kingdom Management at 98%, placing governance above even Isekai at 92% and Magic at 85%. That ranking captures why the season’s appeal is rooted in systems, factions, and administration rather than only combat escalation.
2
Studio 8bit handles the animation production, and early web reactions specifically praise the season’s smooth progression and engaging visual presentation. The production is being received as a continuation of Slime’s established house style rather than a disruptive tonal reset.
3
The staff structure pairs director Naokatsu Tsuda with assistant director Kenji Yasuda and supervisor Atsushi Nakayama, while Hitomi Ogawa oversees series composition. That division is notable for a long-running fantasy adaptation where consistency of tone and continuity management matter as much as individual set pieces.
4
The tag spread is unusually broad for a mainstream isekai sequel: Crossdressing sits at 79%, Dungeon at 75%, Skeleton at 73%, Politics at 66%, and both Swordplay and Henshin appear at 60%. That mix signals a season catalogued by viewers for social identity motifs, monster fantasy, dungeon structure, and weapon-based action in the same package.
5
Its reception profile is strong but not hype-only: MAL lists an 8.1 score from 31,551 votes and AniList lists 82/100 with 3,730 favourites while the season is still airing. Those numbers suggest sustained franchise trust even with complaints about the opening stretch’s slower tempo.

Fun Facts & Trivia

Fun fact 1: Season 4 premiered on April 3, 2026 and is listed as currently airing, meaning its MAL score, rank, and popularity are still being shaped episode by episode.
Fun fact 2: The key credits list Fuse and Taiki Kawakami under Original Story, with Mitz Vah credited for Original Character Design. That credit stack reflects how the anime page acknowledges multiple layers of Slime’s source-material identity rather than only the novel origin.
Fun fact 3: Ryouma Ebata is credited for Character Design, while Ayumi Satou serves as Art Director and Ayami Hidaka handles Art Design. The separate art credits point to a production pipeline that distinguishes character readability from environmental and setting design.
Fun fact 4: Miho Okasaki is the listed Japanese voice actor for Rimuru Tempest, continuing one of the franchise’s most recognizable casting anchors: a performance that has to balance ruler, comic lead, negotiator, and nonhuman reincarnation icon.
Fun fact 5: MAL places the season at rank #600 and popularity #1293 during its broadcast window, while AniList records 3,730 favourites. The gap between rank and popularity shows a sequel with a comparatively concentrated but highly approving audience.