A salaried worker stabbed to death is reborn in another world as the slime **Rimuru**, building a nation while recruiting the strongest races as allies.
A mega-hit with over 40 million copies in circulation, the anime enjoys enormous worldwide popularity.
**Season 4** depicts a new conflict as forces wary of Tempest's rise begin to move — clashes with former hero Granbell and Mariabell, and Demon Lord Leon's schemes.
It premieres April 3, 2026, with **Eight Bit** continuing as the studio ✨
📝 魅力・見どころ・特徴 ネタバレ控えめ
01① Nation-Building Meets Isekai Battle
A royal-road isekai story as Rimuru builds "a nation where humans and monsters coexist" with his allies.
From politics, diplomacy, and economy to large-scale battles, its grand scale is the appeal.
02② New Threats Targeting Tempest
In Season 4, forces wary of Rimuru's ascent make their move in earnest.
The schemes of former hero Granbell and his granddaughter Mariabell intersect with Demon Lord Leon's actions.
03③ A Vibrant Cast of Allies
Ogre warriors Benimaru, Shuna, and Shion, the primordial demon Diablo, and more — a lineup of vividly distinct allies.
Each one's exploits and growth are a highlight.
04④ Star-Studded Theme Songs
The OP theme is "Esoragoto" by Eir Aoi, and the ED theme is "Katsubo" by CiON.
Songs worthy of the lineage of theme songs that have colored the series.
05⑤ Source Work with 40+ Million Copies
The source is a novel by Fuse, one of the flagship works to emerge from the "Shosetsuka ni Naro" platform.
With intricate worldbuilding and exhilarating developments, it has been beloved for years.
06⑥ 📺 Broadcast & Streaming Info
Premiere: April 3, 2026 (Fri)~
Broadcasting: Nippon TV, BS11 and others
Studio: Eight Bit
Please check the official site for the latest streaming info 📱
💡 注目ポイント・展開予想 軽めネタバレ
In Season 4, the clash with forces wary of Tempest's rise is expected to intensify.
As former hero Granbell, Mariabell, and Demon Lord Leon's moves intersect, the biggest draw is what decisions Rimuru makes as a "king who protects his nation."
Expect new powerful foes and further awakenings among his allies.
🧾 これまでのあらすじ ネタバレあり
Satoru Mikami, stabbed to death, was reincarnated in another world as the slime "Rimuru."
Befriending the Storm Dragon Veldora and recruiting goblins and ogres, he founded the "Jura Tempest Federation." He repelled the Orc Disaster and the Falmuth Kingdom's invasion, and finally evolved into a "Demon Lord."
Season 3 depicted diplomacy with the western nations, the council, and ties with the holy knights as the nation grew ever larger.
✅ 観る・注目するおすすめポイント
The definitive isekai that lets you enjoy both nation-building satisfaction and flashy battles.
The joy of "gathering comrades" as vibrant allies keep joining is second to none. With Raphael explaining the complex lore, even newcomers can relax.
👀 トリビア・驚きの小ネタ集
・Miho Okasaki broke out big with the role of Rimuru.
・Spin-offs like "Slime Diaries" are also popular.
・A "slime" protagonist's novelty helped drive its global hit status.
💫 未回収の伏線 ネタバレあり
● The true aim of former hero Granbell and Mariabell.
● The identity of "a certain girl" Demon Lord Leon keeps searching for.
● The link between the "Infinite Prison" that sealed Veldora and the hero Chloe.
● The Eastern Empire's movements and its designs on Rimuru's nation.
● The mystery of Veldanava, the "Dragon of Chaos," and the True Dragons.
Threads at the core of the series begin moving in Season 4 onward.
💌 次シーズンで絶対バズる名セリフ予想
● "Anyone who hurts my friends is my enemy—no matter who they are."
—The gentle Rimuru's resolve as a king.
● Veldora's booming "Kuaahhahaha!" laugh is also a staple.
Watch for Rimuru's name-declarations and his words for his friends in Season 4.