by ‘The Evolving Jura Tempest Federation’ Marks the Beginning of a New Chapter Following the First Cour Finale
The first cour of That Time I Got Reincarnated as a Slime Season 4 has concluded, and the adventure continues with Episode 84, titled “The Evolving Jura Tempest Federation.” Ahead of its broadcast, the production team has released the official synopsis, advance stills, and staff information for the upcoming episode.
Episode 84 premieres today, June 26, as the series enters a new phase filled with political developments, diplomatic challenges, and fresh conflicts for Rimuru and the Jura Tempest Federation.
The anime continues to air every Friday at 11:05 PM (JST) as part of Nippon TV’s FRIDAY ANIME NIGHT (FuraAni) programming block across the network’s 30 affiliated stations nationwide.
Episode 84: “The Evolving Jura Tempest Federation” Synopsis
Following the defeat of Mariabelle Rosso’s schemes, her control over the Western Nations Council has finally come to an end.
As a result, the Jura Tempest Federation has emerged as the council’s largest and most influential faction. While this marks a major political victory for Rimuru, it also brings a host of new responsibilities.
With diplomatic issues, domestic affairs, and international relations piling up, Rimuru decides to take a short break from paperwork and personally inspect various regions within Tempest.
However, his peaceful inspection is suddenly interrupted when he receives an urgent message from Ramiris, hinting that another unexpected crisis may already be unfolding.
The episode serves as the beginning of the next stage of Rimuru’s journey, balancing political intrigue with the promise of new adventures.
Episode 84 Production Staff
The staff behind Episode 84 includes:
- Script: Koji Saito
- Storyboard: Kenji Yasuda
- Episode Director: migmi
- Chief Animation Directors:
- Kumiko Kitabatake
- Maki Sakai
- Karen Nishibata
- Harune Sugishita
- Ayaka Fukaya
- Reika Morita
Animation production continues to be handled by Eight Bit, the studio responsible for every television season of the franchise.
Season 4 Story Overview
After successfully hosting the Founding Festival and establishing diplomatic ties with neighboring nations, the Jura Tempest Federation moves one step closer to realizing Rimuru’s dream of creating a world where humans and monsters can coexist peacefully.
This vision, known as the Human-Demon Co-Prosperity Sphere, aims to eliminate prejudice and build lasting cooperation among every race.
Despite Tempest’s rapid growth, not everyone welcomes Rimuru’s success.
Several powerful figures begin viewing the Demon Lord as a growing threat.
Among them are:
- Granbell Rosso, the former Hero and leader of the Five Elders.
- Mariabelle Rosso, whose ambitions nearly plunged the Western Nations Council into chaos.
- Demon Lord Leon Cromwell, who has also begun pursuing his own mysterious objectives.
As political alliances shift and new enemies emerge, another legendary Hero is on the verge of awakening, setting the stage for the next major conflict.
With unwavering determination, Rimuru prepares to face whatever challenges await.
About ‘That Time I Got Reincarnated as a Slime’
Based on the light novel series by Fuse and illustrated by Mitz Vah, That Time I Got Reincarnated as a Slime has become one of the most successful modern isekai franchises.
The manga adaptation by Taiki Kawakami, serialized in Monthly Shonen Sirius, has helped the series surpass 56 million copies in worldwide circulation across novels, manga, and related publications.
The anime first premiered in 2018 and has since expanded into multiple television seasons, spin-offs, OVAs, theatrical films, and original stories, earning a massive international fanbase.
Season 4 continues exploring not only large-scale battles but also diplomacy, nation-building, economics, and political strategy—elements that distinguish the series from many traditional fantasy anime.
Broadcast and Streaming Information
Broadcast
- Nippon TV Network
- Every Friday at 11:05 PM (JST)
- Part of the FRIDAY ANIME NIGHT (FuraAni) programming block
The series is also available on multiple streaming platforms following its television broadcast.
Main Staff
- Original Work: Fuse, Taiki Kawakami, Mitz Vah
- Director: Naokatsu Tsuda
- Assistant Director: Kenji Yasuda
- Series Composition: Hitomi Ogawa
- Character Design: Ryoma Ebata
- Monster Design: Takahiro Kishida
- Animation Studio: Eight Bit
- Music: R・O・N
Theme Songs
Opening Theme: Esora-goto by Eir Aoi
Ending Theme: Katsubou by CiON
Main Voice Cast
- Rimuru Tempest — Miho Okasaki
- Raphael (Great Sage) — Megumi Toyoguchi
- Veldora — Tomoaki Maeno
- Benimaru — Makoto Furukawa
- Shuna — Sayaka Senbongi
- Shion — M・A・O
- Souei — Takuya Eguchi
- Hakurou — Hochu Otsuka
- Gobta — Asuna Tomari
- Ranga — Chikahiro Kobayashi
- Milim Nava — Rina Hidaka
- Ramiris — An Haruno
- Diablo — Takahiro Sakurai
- Hinata Sakaguchi — Manami Numakura
- Masayuki — Yoshitsugu Matsuoka
- Granbell Rosso — Daisuke Ono
- Mariabelle Rosso — Inori Minase
- Yuuki Kagurazaka — Natsuki Hanae
Final Thoughts
Episode 84 marks the beginning of a new chapter for That Time I Got Reincarnated as a Slime Season 4. While Tempest enjoys greater political influence than ever before, Rimuru’s responsibilities continue to grow, and new threats are already beginning to emerge.
With fresh diplomatic challenges, mysterious developments involving Ramiris, and the promise of future battles, fans can look forward to another exciting phase of Rimuru’s journey as the beloved isekai series continues its fourth season.
