by Episode 84 “The Evolving Jura Tempest Federation” Synopsis, Preview Images, and Anime Expo 2026 Details Revealed
The highly popular isekai fantasy anime That Time I Got Reincarnated as a Slime Season 4 has released the official synopsis and preview images for Episode 84, titled “The Evolving Jura Tempest Federation.” The episode is scheduled to air on June 26, 2026, on Nippon TV and affiliated networks.
In addition to the episode preview, exciting news has also been announced for international fans. The franchise will officially participate in Anime Expo 2026, North America’s largest anime convention, where special events, autograph sessions, and exclusive merchandise will be available.
As Season 4 continues its second consecutive cour, the story shifts its focus from major political conflicts to the rapid growth and future development of the Jura Tempest Federation, setting the stage for the next major arc.
About That Time I Got Reincarnated as a Slime
That Time I Got Reincarnated as a Slime (commonly known as Tensura) is based on the bestselling fantasy series written by Fuse and illustrated by Taiki Kawakami.
Since its debut, the franchise has become one of the most successful isekai properties in the world, with more than 56 million copies in circulation globally, including novels, manga, and digital editions.
The story follows Satoru Mikami, an ordinary office worker who is killed in modern Japan and reincarnated in a fantasy world as a slime. Taking the name Rimuru Tempest, he uses his unique abilities, intelligence, and leadership skills to build a nation where humans, monsters, and other races can coexist peacefully.
The anime adaptation first premiered in 2018 and quickly gained worldwide popularity thanks to its:
- Rich fantasy world-building
- Memorable characters
- Strategic battles
- Political storytelling
- Heartwarming friendships
- Unique protagonist
The franchise has since expanded into multiple anime seasons, spin-offs, OVAs, movies, games, and novels.
Episode 84 Synopsis: “The Evolving Jura Tempest Federation”
Following the collapse of Mariabelle Rosso’s influence over the Western Nations Council, the political landscape has undergone significant changes.
The Jura Tempest Federation, founded by Rimuru, has now emerged as the largest and most influential faction within the council. While this marks a major victory for Tempest, numerous challenges remain.
Diplomatic relations must be strengthened, infrastructure projects continue to expand, and various domestic issues require attention as Tempest grows into a major world power.
For the first time in a while, Rimuru decides to take a brief break from high-level politics and embarks on an inspection tour across the nation to personally observe its development.
However, his peaceful tour is suddenly interrupted when he receives an urgent message from Ramiris, the Demon Lord known for her eccentric personality and connection to the Labyrinth.
The unexpected message hints that a new problem may be about to emerge, potentially affecting both Tempest and its allies.
As Season 4 approaches its next major turning point, fans can expect a mix of political developments, character interactions, and preparations for future conflicts.
What Happened Previously?
The current arc follows the aftermath of the confrontation involving Mariabelle Rosso, whose attempts to manipulate world politics ultimately failed.
With her control broken, Tempest’s influence across the Western Nations Council has increased dramatically. Rimuru’s vision of peaceful coexistence between humans and monsters is becoming a reality faster than ever before.
However, rapid growth often attracts new challenges.
As Tempest gains power and recognition, other nations, organizations, and powerful individuals continue to watch Rimuru’s actions carefully. While many support his ideals, others may see the growing federation as a potential threat.
Episode 84 appears to focus on these developments while laying the groundwork for future storylines.
New Movie Expands the Tensura Universe
The Tensura franchise continues to grow beyond television.
Earlier this year, the new theatrical film:
That Time I Got Reincarnated as a Slime: Tears of the Azure Sea
was released, marking the franchise’s first major ocean-themed adventure.
The movie introduces new locations, characters, and mysteries while expanding the world beyond the borders of Tempest.
Its release demonstrates the continued popularity of the franchise and its ability to explore new stories while remaining connected to the main narrative.
Tensura Confirmed for Anime Expo 2026
International fans will also have a chance to celebrate the series at Anime Expo 2026, which takes place from July 2–5, 2026, at the Los Angeles Convention Center in California.
As one of the largest anime conventions in the world, Anime Expo attracts hundreds of thousands of attendees each year.
Special Tensura Activities Include:
Exclusive Rimuru Illustration Booklet
Bandai Namco Filmworks will distribute a special edition booklet titled:
Bandai Namco Filmworks Anime Mag
The booklet will feature a newly illustrated cover showcasing Rimuru in exclusive artwork created specifically for Anime Expo 2026.
Autograph Session
Fans will have the opportunity to meet:
- Miho Okasaki (Voice of Rimuru Tempest)
- Megumi Toyoguchi (Voice of Raphael)
during a special autograph event scheduled for July 4.
Special Panel Discussions
Panel events featuring staff and cast members will be held on:
- July 4
- July 5
These sessions will discuss the anime’s production, upcoming developments, and behind-the-scenes stories.
Fans unable to attend in person will also be able to watch portions of the panels through livestream broadcasts.
Why Season 4 Is Important for the Series
Season 4 represents a major milestone for Tensura.
Rather than focusing solely on battles, the series has increasingly explored:
- Nation-building
- International diplomacy
- Economic development
- Political alliances
- Leadership challenges
Rimuru’s evolution from a simple slime into a respected ruler has become one of the franchise’s most compelling aspects.
Episode 84 appears to continue this trend by highlighting Tempest’s growth while hinting at new threats and opportunities that could shape the future of the federation.
What Fans Can Expect Next
With the season entering its later stages, viewers can look forward to:
- New political developments
- Additional Demon Lord interactions
- More Tempest expansion projects
- Ramiris’ mysterious emergency request
- New alliances and potential conflicts
- Character-focused moments for Rimuru and his companions
The balance between action, world-building, and character development remains one of Tensura’s greatest strengths.
Final Thoughts
Episode 84 of That Time I Got Reincarnated as a Slime Season 4, titled “The Evolving Jura Tempest Federation,” promises to showcase the continued growth of Rimuru’s nation while introducing a new mystery through Ramiris’ urgent message.
At the same time, the franchise’s upcoming appearance at Anime Expo 2026 highlights its immense popularity among international audiences.
As Tempest enters a new era of prosperity and influence, fans can expect even bigger challenges, deeper political intrigue, and exciting adventures in the episodes ahead.
Episode Information
Title: The Evolving Jura Tempest Federation
Series: That Time I Got Reincarnated as a Slime Season 4
Episode Number: 84
Air Date: June 26, 2026
Main Character: Rimuru Tempest (CV: Miho Okasaki)
Streaming Platforms: ABEMA, Disney+, Hulu, and other major services
Whether you’re a longtime Tensura fan or a newcomer to the series, Episode 84 looks set to deliver another important chapter in Rimuru’s journey toward creating a world where everyone can live together in peace.
