That Time I Got Reincarnated as a Slime Season 4 unveiled its Cour 2 key visual, main promo video, and new theme songs performed by Daoko and Azusa Tadokoro.
That Time I Got Reincarnated as a Slime Season 4 unveiled a new key visual and main promotional video for its upcoming second cour on Friday, alongside the announcement that Daoko and Azusa Tadokoro will perform the new theme songs.
The second cour will feature an opening theme titled "TACTIC" performed by Daoko, the singer-songwriter known for her genre-blending style that has made her a staple of anime music over the past several years. The ending theme, "Hymnal," will be performed by Azusa Tadokoro, a voice actress and singer with a deep catalogue of anime tie-in tracks. The new songs replace the first cour's opening "Esoragoto" by Eir Aoi and ending "Katsubo" by CiON, signaling a tonal shift as the story enters its next phase.
Season 4 premiered on April 3, 2026, and is structured as an ambitious five-cour run the first two of which air continuously before a break. Studio 8-Bit, which has animated the franchise since its debut in October 2018, returns to handle production. Miho Okasaki reprises her role as protagonist Rimuru Tempest, supported by a returning cast that includes Makoto Furukawa as Benimaru and Asuna Tomari as Shion. The sprawling episode order reflects the depth of remaining source material; Fuse's original light novel series concluded with Volume 23 in November 2025, giving the anime a completed narrative to draw from rather than risking an original ending.
The newly released promotional video offers a fresh look at the conflicts and character dynamics awaiting viewers in the second cour. While the first cour established the political and military tensions surrounding Rimuru's growing nation of Tempest, the trailer hints at escalating stakes as familiar allies and new adversaries take center stage. Several sequences in the trailer showcase large-scale battle animation, suggesting that 8-Bit is investing heavily in the action set pieces for the continuation. The accompanying key visual reinforces the scale of the battles ahead, featuring Rimuru in a commanding pose surrounded by his inner circle.
The Season 4 announcement arrives during a period of strong momentum for the TenSura franchise. The second theatrical film, Tears of the Azure Sea, opened in North American theaters on May 1, 2026, through Crunchyroll with both subtitled and English-dubbed screenings. A Japanese Blu-ray release for the film is scheduled for September 25. The franchise's continued expansion across television, film, and home video underscores its position as one of the isekai genre's most commercially durable properties.
Crunchyroll streams That Time I Got Reincarnated as a Slime Season 4 as it airs, with new episodes available shortly after their Japanese broadcast. The platform also hosts the previous three seasons and the first theatrical film for viewers looking to catch up before the second cour's continuation. With "TACTIC" by Daoko and "Hymnal" by Azusa Tadokoro set to soundtrack the next chapter of Rimuru's journey, the franchise shows no signs of slowing down as it enters the second phase of its final adaptation.
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