Isekai is the most popular genre in anime right now. It is also the most saturated — for every great isekai there are fifty forgettable ones where a generic protagonist gets transported to a fantasy world and immediately becomes overpowered. Finding the good ones requires either years of watching or a reliable guide.
This is the reliable guide. These ten isekai anime are genuinely excellent. Every one of them does something the others do not.
What is Isekai?
Isekai (異世界, "different world") is a genre in which the protagonist is transported from their ordinary world to another — usually a fantasy realm, often one resembling a video game. The genre exploded in popularity around 2012 and now dominates anime seasonal charts.
The best isekai use the premise to explore interesting worlds, characters, or ideas. The worst use it as an excuse to make the protagonist effortlessly powerful. This list contains only the former.
1. Re:Zero — Starting Life in Another World (2016)
Re:Zero is the best isekai ever made and it is not particularly close. Subaru Natsuki is transported to a fantasy world and discovers he has one power: when he dies, he returns to a checkpoint in the recent past. The power sounds advantageous. It is not.
What makes Re:Zero special is that it takes the idea seriously. Every death is traumatic. The resets do not erase the psychological damage of what Subaru has experienced. He develops PTSD, makes terrible decisions, alienates people he loves — and the show never lets him off the hook for any of it.
The character of Rem alone has generated more emotional investment from anime fans than entire other series. Season two's psychological breakdown sequence is one of the finest pieces of character writing in the genre.
Episodes: 50+ | Genre: Dark Fantasy, Psychological
2. Overlord (2015)
Overlord flips the isekai premise. Momonga is a powerful wizard who gets trapped in his game's world after the servers shut down. Unlike most isekai protagonists, he is already the most powerful being in the setting from episode one. The show is not about becoming strong — it is about what you do with power, and what it does to you.
The genius of Overlord is that the protagonist is the villain from the perspective of the world's inhabitants. We follow him sympathetically while watching him cause immense destruction. The world-building is extraordinary — each nation, faction, and power structure is developed with real depth.
Episodes: 52+ (four seasons) | Genre: Dark Fantasy, Strategy
3. That Time I Got Reincarnated as a Slime (2018)
Tensura is the warmest isekai on this list. Satoru Mikami is reincarnated as a slime with the ability to absorb and replicate any skill or property. He builds a nation of monsters based on cooperation rather than dominance.
The show is not dark. It is optimistic, funny, and deeply invested in community-building. Watching Rimuru figure out how to create a functional society from disparate monster tribes — negotiating, mediating, planning — is genuinely satisfying. It is the isekai for people who want to watch someone be competent and kind.
Episodes: 48+ (two seasons + films) | Genre: Fantasy, Adventure, Slice of Life
4. No Game No Life (2014)
No Game No Life is the fantasy of being so good at games that you become unstoppable. Siblings Sora and Shiro are transported to a world where all conflict is resolved through games. They are the best gamers in existence.
The show is visually distinct — a supersaturated color palette that looks unlike any other anime. The game sequences are genuinely clever, playing with strategy, psychology, and misdirection. It has only one season and no announced continuation, which remains one of anime's great disappointments.
Episodes: 12 | Genre: Fantasy, Game, Comedy
5. Sword Art Online: Aincrad Arc (2012)
SAO is controversial. Later arcs have serious problems. But the original Aincrad arc — the first 14 episodes — is excellent isekai storytelling. Players are trapped in a VR game where dying in the game means dying in reality. Kirito is a solo player navigating both the game and relationships with other players.
The stakes are real, the world is engaging, and Kirito and Asuna's relationship develops naturally across a compressed timeline. Watch the Aincrad arc and decide for yourself whether to continue.
Episodes: 14 (Aincrad arc) | Genre: Action, Fantasy, Romance
6. The Rising of the Shield Hero (2019)
Shield Hero is built around unfairness. Naofumi is summoned as a hero, immediately framed for a crime he did not commit, and left with nothing. He builds back from zero using only his defensive abilities while navigating a world that despises him.
The first season is compelling underdog storytelling with genuine emotional weight. The injustice Naofumi faces is specific and the way he adapts to it is satisfying. Later seasons decline in quality, but season one is among the best in the genre.
Episodes: 25 (Season 1) | Genre: Action, Adventure, Fantasy
7. Mushoku Tensei: Jobless Reincarnation (2021)
Mushoku Tensei is the most technically accomplished modern isekai. The protagonist is reincarnated as a baby in a fantasy world, retaining his memories, and grows up as someone trying to be better than he was. The world-building is extraordinary — the magic system alone has more internal consistency than most fantasy novels.
A warning: the protagonist has serious problems in his past life and the show is not shy about depicting his flaws. It does not glorify them, but it does not sanitize them either. If you can engage with a genuinely flawed protagonist being shown his flaws, this is exceptional.
Episodes: 23+ (two seasons) | Genre: Fantasy, Adventure, Drama
8. KonoSuba: God's Blessing on This Wonderful World (2016)
KonoSuba is the funniest anime I have ever seen that is technically an isekai. Kazuma dies a humiliating death and is sent to a fantasy world with a goddess who turns out to be completely useless. They build a party of equally useless characters and fail repeatedly at adventuring.
Every episode is a comedic setpiece that plays with and subverts isekai tropes. The characters are terrible people who are somehow deeply lovable. The dub is particularly excellent.
Episodes: 20 + film | Genre: Comedy, Fantasy, Parody
9. The Saga of Tanya the Evil (2017)
Tanya the Evil is the isekai for people who want something genuinely unusual. A ruthless Japanese salaryman dies and is reincarnated — against his will — as a small blonde girl in a world resembling World War I Europe. He continues to be ruthless.
The show is a military strategy anime wrapped in isekai trappings. Tanya's tactical brilliance and complete amorality make her one of the most compelling isekai protagonists despite — or because of — her being a villain protagonist.
Episodes: 12 + film | Genre: Military, Dark Fantasy
10. Spirited Away (2001)
Spirited Away is the greatest film about someone transported to another world ever made, and it is technically isekai. Ten-year-old Chihiro is pulled into the spirit world when her parents are transformed into pigs and must work in a bathhouse for spirits to survive and find a way to free them.
Hayao Miyazaki's direction and the world design are unparalleled. Every creature in the spirit world is original. The story is simple and human. It is one of the greatest films ever made in any medium.
Runtime: 125 minutes | Genre: Fantasy, Adventure
FAQ
What is the best isekai anime to start with? KonoSuba or Tensura for something fun and accessible. Re:Zero if you want the best writing in the genre. No Game No Life if you want clever game-based storytelling.
Why is isekai so popular? Isekai fulfills a fantasy that is universally relatable: being taken out of your ordinary, boring life and placed somewhere where your potential can actually be realized. The best isekai layer genuine storytelling on top of that fantasy. The worst coast on it.
Is isekai a new genre? No — stories about people transported to other worlds go back centuries. In anime, early examples include Inuyasha (2000) and The Vision of Escaflowne (1996). The current surge began around 2012 with SAO and accelerated through the 2010s.
