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
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Oct 6, 2021 to Dec 22, 2021
Premiered: Fall 2021
Broadcast: Wednesdays at 23:00 (JST)
Licensors: None found, add some
Genres: ActionAction, DramaDrama, FantasyFantasy, MysteryMystery, RomanceRomance
Themes: IsekaiIsekai, ReincarnationReincarnation
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.341 (scored by 297419297,419 users)
1 indicates a weighted score.
Ranked: #25312
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #416
Members: 537,013
Favorites: 4,181

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Ranked #2531Popularity #416Members 537,013
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Episodes: /12


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]


Sekai Saikou no Ansatsusha, Isekai Kizoku ni Tensei suru adapts the first volume of Rui Tsukiyo's light novel series of the same title.

Characters & Voice Actors


Takahashi, Chiaki


Momosuzu, Nene

Liannenon, Epona


Tuatha Dé, Cian

Morikawa, Toshiyuki


Matsukawa, Hiroki



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)

Episode Videos


Dec 22, 2021
When an author proclaims that one of their works is the best/finest that they have ever written, you'd better take them at their word seriously. It's especially more so from one that has created one of the most controversial works adapted into anime, rightsmack at the beginning of the year: Redo of Healer. That's right, Rui Tsukiyo is once again back on the anime scene, and this Isekai Assassin work that this chill furry dude has so thoroughly written, is indeed no pushover. It's something that feels a lot more like your traditional decent Isekai reincarnation story, with a premise that makes it kinda impressive ...
Aug 29, 2023
Mixed Feelings
At first you expect a series of the lot but the episodes go by and try to be different although this does not achieve it so much for the simple reason that it has many clichés of reincarnation series, they want to turn it around as they present it, because the reincarnated He is a person with great ability and not just anyone, it is interesting how the episodes go by since I really liked the plot, it is one of those simple series in its realization but with interesting concepts (not impressive or innovative, just interesting), come on seeing how the reincarnated was not ...
Dec 22, 2021
My parents used to tell me 'life is too short, so make every second count'. Maybe you've heard of that familiar advice before too. What if I told you that the protagonist in this show lives his life as an assassin and takes other people's lives? Sounds daunting, I know. Well, that didn't stop the author introducing us to Lugh Tuatha De, a character who lives by his code and lives his life as an assassin.

Before diving into the juicy details, I do want to mention that this is the same author who wrote Kaifuku Jutsushi no Yarinaoshi. If you don't know what the means, ...

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