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Synopsis

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! (Source: Crunchyroll News)

Details

That Time I Got Reincarnated as a Slime Season 4 is a 24-episode TV series produced by 8-bit, adapted from the light novel, airing since Spring 2026.

Type: TV
Aired: 2026-04-03 to 2026-09-25
Season: Spring 2026
Episodes: 24
Duration: 24 min per ep
Source: Light novel
Studio: 8-bit
Producers: Bandai Namco Filmworks, Kodansha, Micro Magazine Sha, Bandai Namco Music Live

Theme songs

2 openings and 2 endings from That Time I Got Reincarnated as a Slime Season 4, and who performed each

Song titles link to Amazon Music. These are paid links — we may earn a commission, at no extra cost to you.

Openings

OP1
Esoragoto
- Eir Aoi · performance
- Ayato Shinozaki · composition, arrangement
- Ryousuke Tachibana · composition, arrangement
- Takanori Mizoguchi · lyrics
OP2
TACTIC
- DAOKO · performance, lyrics
- Giga · composition, arrangement
- TeddyLoid · composition, arrangement