Sekai Saikou no Ansatsusha, Isekai Kizoku ni Tensei suru

The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat

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Alternative Titles

Synonyms: The world's best assassin, To reincarnate in a different world aristocrat, Ansatsu Kizoku
Japanese: 世界最高の暗殺者、異世界貴族に転生する
English: The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat
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Type: TV
Episodes: 12
Status: Currently Airing
Aired: Oct 6, 2021 to ?
Premiered: Fall 2021
Broadcast: Wednesdays at 23:00 (JST)
Licensors: None found, add some
Source: Light novel
Genres: ActionAction, DramaDrama, FantasyFantasy, MysteryMystery, RomanceRomance
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.691 (scored by 4066740,667 users)
1 indicates a weighted score.
Ranked: #10952
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #816
Members: 219,436
Favorites: 2,143

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Ranked #1095Popularity #816Members 219,436
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The world's greatest assassin had sworn lifelong allegiance to the organization that raised him. However, despite his loyalty, that very same organization takes action to silence him, ultimately leading to his demise. Drowning in frustration and regrets he can no longer suppress, he finds himself in an audience with a goddess attracted by his exceptional skills. The goddess offers him reincarnation into a magnificent world of swords and magic so he can perform a crucial mission: prevent that world's destruction by slaying its hero.

Accepting the goddess' request, he is reborn as Lugh Tuatha Dé, the son of a noble family of assassins serving the Alvan Kingdom. Under the guidance of his father, Lugh learns new assassination techniques that significantly differ from the cold-blooded and unsympathetic killing style of his previous life. Furthermore, his other talents bloom, allowing him to meet new allies and acquaintances. Even so, Lugh knows that his efforts are far from adequate, because a monumental adversary such as the hero can only be defeated with perfection.

[Written by MAL Rewrite]


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Episode Videos

Related Anime

Characters & Voice Actors










Tamura, Masafumi
Takayama, Katsuhiko
Script, Series Composition
Yuuki, Aira
Theme Song Performance
Ninomiya, Yui
Theme Song Performance


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Dark seeks light" by Yui Ninomiya

Ending Theme

"A Promise" by Aira Yuuki (結城アイラ)

Nov 2, 2021
IkeDerp (All reviews)
Main character is a Mary Sue who can do anything and gets all the girls (including his mom motorboating him)

It gets ridiculous when they start writing their own spells because he happens to know the exact values of gravity, melting point and atomic weight of any metal, which is vital to write your metal creating spell which he of course found out since it's logical, right?

I was hoping to watch an old assassin in a kids body doing some cool stuff and struggle here and there in the fantasy setting, instead you get an all-knowing demigod kid gathering his harem and doing everything perfectly. Greeeaaat.
Oct 27, 2021
frenzi (All reviews)
World's Finest Assassin seems to be nothing special in the genre of Isekai. We have an overpowered MC with anti-hero vibes surrounded by a bunch of cute girls for his harem. It has a dark theme from killing and torture, but fortunately, it doesn't go to the extremes. The fanservice is not the kind where the MC assaults every girl he encounters. The girls show signs of interest in the MC like sneaking into his bed, but the MC simply uses the girls for his mission. Since his main focus is getting stronger. It is more fantasy and action-oriented, surprisingly a well written one, and read more
Oct 27, 2021
SpRayquaza11 (All reviews)
Ah yes, the beauty of a good adaptation finally….

The manga and light novel of this series are undoubtedly not for everyone , some might argue (and not without reason) that this is generic isekai tash . After skimming through the first 10 chapters of the manga, I can proudly admit that this is one of those rare cases where ….

anime >>LN>>> manga
Probably follows LN to a better degree from what I have heard and cuts most of the questionable ecchi stuff (sasuga author of Redo of healer)

Honestly, I did not expect much after reading the manga and having seen the authors other work i.e. Redo read more
Oct 27, 2021
In_human (All reviews)

My Opinion
Well, coming from the author of "Redo of Healer" this anime isn't what anyone expected instead it's quite good. It has some of the new elements added to it. And, yeah I enjoyed while watching it.

Story 8
The main point would be does this anime have a good story? I mean yeah sure it does have a good story. Who doesn't like a super badass assassin. The whole point this anime is based on is kinda cool. I mean almost all the isekai shows us how a powerful hero is always good & kind. But, this anime also explores the read more


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