‘That Time I Got Reincarnated’ as a Slime Season 4 Episode 15 Arrives This Week on Crunchyroll
Fans following the ongoing story of Rimuru Tempest and the Jura Tempest Federation have another new chapter on the way. ‘That Time I Got Reincarnated as a Slime’ continues its fourth season run with Episode 15, part of a broadcast that has been airing weekly since the season’s April debut.
The show remains one of the more closely tracked isekai series currently airing, and its shift into the political tension surrounding the Rosso family has kept the narrative moving at a steady pace heading into this stretch of episodes.
Season 4 Episode 15 Release Date and Time
Episode 15 of ‘That Time I Got Reincarnated as a Slime’ Season 4 is set to premiere on July 17, 2026. That release date comes from streaming guide listings tracking the season’s rollout.
The season has followed a consistent Friday release pattern since it began. New episodes are scheduled to go live at 7 a.m. Pacific Time and 10 a.m. Eastern Time on Crunchyroll. For viewers in other regions, that translates to 8 a.m. Mountain Time, 9 a.m. Central Time, and 2 p.m. Greenwich Mean Time.
Episode numbering across tracking sites has occasionally varied slightly depending on how specials or recap installments are counted, but the Friday timing has held steady through the season. Episode tracking data lists the preceding entry, titled ‘The Black Numbers,’ as airing July 10, 2026, with ‘New Companions’ having aired the week before on July 3, 2026.
Where to Watch New Episodes
‘That Time I Got Reincarnated as a Slime’ Season 4 is not airing on a single global platform in isolation. Crunchyroll holds streaming rights across North America, Central America, South America, Europe, Africa, Oceania, the Middle East, the CIS region and Southeast Asia.
In Japan, the series has its own dedicated broadcast slot. The anime airs domestically as part of NTV’s Friday Anime Night programming block.
Episodes are not limited to the original Japanese audio track for international audiences. New episodes are released with both English subtitles and an English dub. That dual release approach has been consistent with how Crunchyroll has handled the series throughout its run, giving viewers flexibility in how they catch up week to week.
What to Expect From the Story
The fourth season picks up with Rimuru’s larger ambition still front and center. Following the Founder’s Festival and the establishment of diplomatic ties with multiple nations, the Jura Tempest Federation is working toward what the story calls the Human Monster Coexistence Sphere, a vision built on cooperation across racial lines.
That progress has not gone unchallenged. Granbell Rosso, described as the former Hero and head of the Five Elders of the Kingdom of Siltrosso, opposes Rimuru’s rise alongside his granddaughter, Mariabell Rosso, with the two working to protect humanity by asserting control over it rather than coexisting with ‘Tempest.’
Recent episodes have pushed that conflict toward a breaking point. In the episode titled ‘Tempest Evolves,’ Mariabell’s hold over the Western Nations Council was lifted, leaving the Jura Tempest Federation as the largest faction within it, while Granbell was shown visiting the grave of his deceased wife, the original incarnation of Mariabell, grappling with the loss of his granddaughter and the collapse of his plan.
How excited are you for episode 15?
Elsewhere in the world, the story has continued building out its supporting cast of Demon Lords. In El Dorado, Demon Lord Leon is shown working toward goals of his own, with the season’s official synopsis noting that the awakening of a new Hero draws near. Episode 15 arrives with that thread still unresolved, leaving room for the season to bring Leon’s storyline further into focus.
Season 4 Episode Schedule and Cast
The current stretch of episodes belongs to the first two of five planned cours for the season. The fourth season was set to premiere across five cours total, with the first two airing consecutively starting April 3, 2026, while release windows for the remaining three cours had not yet been confirmed.
That structure means the season is intended to run well beyond a standard 12 or 13 episode block. The season is expected to include 60 episodes altogether across its five cours, with the first two cours accounting for 24 episodes combined.
Behind the camera, the production has kept much of its established creative team in place. Naokatsu Tsuda is directing the anime at Studio 8bit, the same studio that has handled the series since its debut. Miho Okasaki continues in her role as Rimuru Tempest, the series’ protagonist, for this fourth season.
Music has also carried over familiar names into this run of episodes. Eir Aoi performs the season’s opening theme, titled ‘Esoragoto (Unrealistic),’ while CiON provides the ending theme, ‘Katsubō (Craving).’ Those tracks have bookended each episode throughout the season’s first half, including the run leading into Episode 15.
With Granbell’s plans in disarray and Leon’s next move still unclear, ‘That Time I Got Reincarnated as a Slime’ has left plenty on the table heading into its next episode, and it’s worth hearing where longtime readers of the story think Rimuru’s uneasy peace with the Rosso family goes from here.
