The world of That Time I Got Reincarnated as a Slime is not slowing down anytime soon. Just as Season 4 reaches another major stopping point, the franchise is already looking beyond the current arc, with two very different anime stories preparing to arrive in 2027.

One will return fans to Rimuru Tempest’s continuing journey. The other will put one of the franchise’s most memorable antagonists back in the spotlight. But before either story arrives, the latest announcements have revealed how closely the two projects are being positioned.

That Time I Got Reincarnated as a Slime Season 4 Cour 3 arrives in July 2027

The second cour of That Time I Got Reincarnated as a Slime Season 4 has now concluded, but the ending is far from a final goodbye.

The official series website has confirmed that Season 4 Cour 3 will begin airing in July 2027. A specific premiere date within July has not yet been announced, so the month is currently the confirmed broadcast window.

That continuation is particularly significant because Season 4 was already planned as a five-cour production. In other words, the July 2027 return is not the announcement of a separate fifth season. It is another stage of the existing fourth season.

The current season began airing in Japan on April 3, 2026, with Crunchyroll streaming it internationally from its premiere.

Slime isn’t the only long-running series gearing up for a darker turn in its next chapter. One beloved apothecary drama is also promising a more intense story ahead for its leads. Read our story on The Apothecary Diaries Season 3 Teases a Darker New Chapter for Maomao and Jinshi

What Season 4 is building toward

Season 4 continues Rimuru’s efforts to develop Tempest while larger conflicts surrounding the Jura Tempest Federation continue to unfold.

The story involves the Rozzo family, Leon and the wider world surrounding Tempest, with Granville Rozzo and his granddaughter Maribel Rozzo standing against Rimuru over their plan to protect humanity by ruling over it.

Crunchyroll’s official synopsis states:

“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!”

That storyline will continue into the third cour when Season 4 returns in July 2027.

The production team also remains anchored by familiar names. Naokatsu Tsuda serves as director, Hitomi Ogawa handles series composition, Ryoma Ebata is the character designer, and 8-Bit remains responsible for animation production.

Before Rimuru returns, Clayman is getting another chance

While Season 4 Cour 3 is still some time away, Tensura fans have another major anime project to look forward to first.

That Time I Got Reincarnated as a Slime: Clayman’s Revenge is officially scheduled to begin broadcasting in April 2027.

The spinoff is based on the manga created by Wataru Kajika from an original concept by Fuse, and its entire premise turns the spotlight toward a character whose story seemed to have already reached its end.

The announcement uses the striking tagline:

“I decided to do everything over again.”

That line sets up the central hook of Clayman’s Revenge. Following Clayman’s defeat at the Walpurgis Festival, his ambitions appeared to be finished. The spinoff instead explores what happens when the fallen Demon Lord gets another opportunity to change his fate.

Rather than simply retelling the main Slime story through Clayman’s eyes, the project follows a different route through the franchise’s world, built around the possibility of a second chance.

Not every anime story on the schedule is looking ahead to more seasons, some are wrapping up for good. One recently concluded series closed things out with a touching farewell after a full 12-episode run. Check our coverage of Goodbye, Lara Finale Brings a Heartwarming Lara and Mari Memorial Visual After 12-Episode Anime Journey

Takehito Koyasu returns to voice Clayman

For fans who already know Clayman from the main television anime, one familiar element is staying exactly where it belongs.

Takehito Koyasu will reprise his role as Clayman for Clayman’s Revenge.

Koyasu previously provided the character’s voice in the main anime, and the official cast announcement confirms his return for the spinoff. That keeps the same voice behind Clayman as the character moves into his own story.

The principal Clayman’s Revenge anime staff includes:

Role	Confirmed detail
Director	Kentaro Sugimoto
Series composition	Yuji Haibara
Character design	Asumi Hashimoto and Hideki Sakai
Animation production	8-Bit
Clayman	Takehito Koyasu
Source material	That Time I Got Reincarnated as a Slime: Clayman Revenge

The official Japanese announcement credits Wataru Kajika, Fuse and Mitz Vah, with the manga serialized in Kodansha’s Monthly Shonen Sirius.

Clayman’s Revenge has been growing since 2022

The anime is not adapting a brand-new story created specifically for television.

The Clayman’s Revenge manga began publication in 2022, with Wataru Kajika handling the manga and Fuse credited as the original creator. Kodansha’s current catalogue lists nine collected volumes, with Volume 9 released on August 7, 2026.

That is a notable expansion from the story’s original expectations.

Fuse has explained that the project began with a much smaller idea in mind. What started as a relatively simple spinoff continued to develop as readers responded to it, eventually leading to an anime adaptation.

And Fuse’s own comments make it clear that even the original creator was surprised by how quickly the project grew.

Fuse reveals how the Clayman spinoff became an anime

In his comment released alongside the anime announcement, Fuse said:

“Clayman’s Revenge started as an idea that just happened to cross my mind, but now, amazingly, it is getting an anime adaptation!”

He continued:

“Things have moved along so smoothly ever since the project began that even I, as the original creator who proposed the idea, have been feeling nervous about how quickly everything is progressing. Laughs.”

The concept itself also came from a deliberately funny character moment.

Fuse described Clayman attempting to maintain his intimidating image while reprimanding one of his subordinates. Then wine spills onto his pristine white suit, leaving Clayman desperately trying to conceal the stain so nobody notices.

Fuse explained:

“The concept behind Clayman’s Revenge was simply the idea that something like that would already be funny on its own.”

The original plan was far more modest than the nine-volume manga that now exists.

“At first, I wrote the plot thinking that it would be nice if the series could last for around two volumes.”

But the response from readers changed those expectations.

“Thankfully, however, it has been well received by fans, and now I would like to keep it going for as long as possible!”

For the anime, Fuse also wants Clayman’s more serious side to remain part of the experience without losing the lighter spirit behind the project.

“While I would like to have Clayman show his serious side from time to time, I basically want this to remain a work that people can simply enjoy.”

He also highlighted the importance of everyone involved in bringing the project to television:

“Most importantly, I hope that not only Kajika sensei and I, but everyone on the anime production team as well, can come together as one team and enjoy creating this series.”

Fuse concluded:

“That is the spirit in which the Clayman’s Revenge anime is being produced, and I hope you will continue to support it!”

Wataru Kajika cannot wait to see Clayman’s army animated

Fuse is not the only creator excited about the transition from manga panels to television.

Manga artist Wataru Kajika also shared his reaction to the anime adaptation, explaining just how extraordinary the journey has been from the beginning.

Kajika said:

“Just being given the opportunity to draw a spin off manga of That Time I Got Reincarnated as a Slime already felt like a miracle to me, so even after I was told it was getting an anime adaptation, it did not feel real for quite some time!”

He has already had a chance to see parts of the production process firsthand. Kajika revealed:

“I have been shown the anime character designs and even had the chance to visit the voice recording sessions, and I have been constantly moved by the experience!”

But there is one particular part of the adaptation that has him especially excited:

“I really, truly cannot wait to see Clayman’s army in animated form!”

A new 8-Bit collaboration connects both 2027 anime projects

The two productions are also being presented together.

Following the Season 4 second-cour conclusion, the official website released a special collaboration video featuring Season 4 and Clayman’s Revenge.

The footage was newly animated by 8-Bit specifically for the announcement, bringing the main series and its upcoming spinoff together ahead of their respective 2027 releases.

That gives fans an early visual connection between the two projects, even though they occupy different sides of the Slime franchise’s storytelling.

The contrast is part of what makes the upcoming schedule interesting. One project continues Rimuru’s established journey through the fourth season, while the other gives Clayman a chance to explore what could happen after the ending that originally appeared to define his fate.

The 2027 Slime anime schedule is taking shape

For now, the official release windows establish a straightforward sequence:

Month	Anime release	Current confirmed detail
April 2027	That Time I Got Reincarnated as a Slime: Clayman’s Revenge	TV anime begins broadcasting
July 2027	That Time I Got Reincarnated as a Slime Season 4 Cour 3	Third cour begins airing

Neither production has received a specific premiere date beyond its announced month.

International streaming information for Clayman’s Revenge and additional cast or staff details may also be announced later.

What is already clear is that the franchise has a substantial amount of material moving forward. Clayman’s Revenge has reached nine collected manga volumes, while Season 4 was structured from the beginning as a five-cour season.

Two different stories, one major year for Tensura

The next phase of That Time I Got Reincarnated as a Slime is taking shape through two very different anime releases.

First comes Clayman’s Revenge in April 2027, shifting the spotlight to the former Demon Lord and exploring the possibility of rewriting the path that followed his defeat at Walpurgis.

Then, in July 2027, That Time I Got Reincarnated as a Slime Season 4 Cour 3 brings audiences back to Rimuru and the continuing story of Tempest.

With Takehito Koyasu returning as Clayman, 8-Bit handling animation production on both projects, and the official collaboration already connecting them, 2027 is set to keep the Slime universe moving on two fronts.

Slime isn’t the only franchise confirming its next chapter after a big season finale. A different underdog fantasy series has also locked in a third season following its own satisfying conclusion. For more, read our post on From Old Country Bumpkin to Master Swordsman Season 3 Confirmed: Everything We Know After Season 2 Finale

Conclusion

The That Time I Got Reincarnated as a Slime franchise has officially mapped out a busy 2027. Clayman’s Revenge will make its TV anime debut in April, while Season 4 Cour 3 will continue Rimuru’s story in July.

For now, the exact premiere dates remain unannounced. But the broad roadmap is already confirmed: Clayman gets his second chance first, and Rimuru’s fourth-season journey follows a few months later.

Source/research disclaimer: This article has been prepared based on thorough research of the official announcements, publishing information and streaming coverage provided in the source material above. The article reflects information available from those sources as of September 26, 2026. Exact premiere dates, international streaming details and additional cast or staff information may be announced at a later date.

Sources

• That Time I Got Reincarnated as a Slime official website – Season 4 Cour 3 and Clayman’s Revenge announcement
• That Time I Got Reincarnated as a Slime official website – Clayman’s Revenge teaser visual and staff announcement
• Kodansha – That Time I Got Reincarnated as a Slime: Clayman’s Revenge
• Kodansha – Clayman’s Revenge Volume 9
• Crunchyroll News – That Time I Got Reincarnated as a Slime Season 4 streaming announcement
• Crunchyroll News – Season 4 guide, cast, staff and story details
• ORICON – Season 4 Cour 3 and Clayman’s Revenge anime announcement

Featured Image Credit: © Wataru Kajika, Fuse, Kodansha / Clayman’s Revenge Production Committee / 8-Bit