THAT TIME I GOT REINCARNATED AS A SLIME

Basic Information

Japanese Title: 転生したらスライムだった件

English Title: That Time I Ghot Reincarnated as a Slime

Original Author: Fuse

Manga Artist: Taiki Kawakami

Genres: Isekai, Action, Adventure, Fantasy, Political, World-Building

Status: Ongoing (Manga), Anime Adaptation Available

Main Storyline

The story begins with a sudden and unexpected event in the peaceful life of Satoru Mikami, a 37-year-old office worker living in Japan. In a random moment while walking with a colleague, he is fatally stabbed. However, this death is not the end but rather the beginning of an entirely new journey as Satoru is reincarnated into a different world a fantasy realm filled with magic, monsters, and supernatural forces. What makes his reincarnation unique is that he does not return as a human or hero, but as a “slime”, a creature considered weak and nearly irrelevant in the food chain of this new world.

Yet, Satoru now in slime form is granted rare skills such as "Predator", which allows him to absorb and replicate the abilities of any creature, and he's aided by the artificial intelligence "Great Sage", an internal AI capable of analyzing, guiding, and optimizing his survival. With these two tools, Rimuru not only survives but evolves at a rapid pace, becoming a being that far surpasses the limitations of any ordinary slime.

Soon after, Rimuru befriends other monsters, starting with a goblin tribe under threat from a pack of direwolves. After defeating the wolf leader, he unites the two groups and becomes their spiritual guide. Through the power of “naming” an act that significantly boosts a monster’s strength and intelligence Rimuru gradually forms a diverse community that includes goblins, ogres, lizardmen, and even high-level beings like dragons, demons, and spirits. Together, they build a brand-new nation: the Jura Tempest Federation.

More than just a powerful figure, Rimuru demonstrates strategic brilliance. He establishes political institutions, enacts laws, organizes a military force, and constructs systems of education and commerce. Over time, Tempest evolves from a hidden monster settlement into a true powerhouse one that rivals and eventually surpasses many human nations.

However, Tempest's rapid growth draws many threats. Human kingdoms view the rise of monsters as a dangerous anomaly, religious cults deem Rimuru a heretic to be eliminated, and powerful Demon Lords and shadowy organizations watch closely some testing him, others seeking to manipulate him. Rimuru constantly faces critical decisions, from diplomatic negotiations to full-scale warfare. In some cases, he must abandon his idealistic principles to protect his people, such as absorbing thousands of souls to evolve into a Demon Lord an irreversible turning point.

From a weary office worker bound by mundane routines, Rimuru rises to become the supreme leader of an entirely new world. He carries divine power, deep compassion, and the heavy responsibility of a young nation standing at the center of immense conflict. His story is not just one of gaining strength but a powerful testament to willpower, responsibility, and the dream of building a better world even if it comes at a high cost.

Main & Supporting Characters

Rimuru Tempest: A former ordinary man who transforms into a godlike being, embodying both immense power and deep humanity.

Veldora Tempest: A catastrophic-level dragon and Rimuru’s first friend and loyal ally.

Benimaru, Shion, Shuna, Diablo, Milim, Ramiris, Guy Crimson... A rich cast of supporting characters, each with their own backstories, strengths, and personalities that add depth to the narrative.

Overall Review

Pros:
Outstanding world-building
A diverse and well-developed character roster
Intelligent storytelling that balances entertainment with meaningful themes
Clean, detailed artwork

Cons:
Some arcs suffer from slow pacing
Requires readers to follow multiple side stories to grasp the full scope

Tensei Shitara Slime Datta Ken is a rare gem among isekai manga, offering not only thrilling action and power fantasies but also thoughtful world-building and emotional resonance. If you're a fan of reincarnation stories that go beyond overpowered battles to explore politics, community, and moral dilemmas, this is a series you shouldn't miss.

FAQ – That Time I Got Reincarnated as a Slime (Manga Version)