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
Source: Light novel
Genres: ActionAction, DramaDrama, FantasyFantasy, MysteryMystery, RomanceRomance
Themes: IsekaiIsekai, ReincarnationReincarnation
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.351 (scored by 296712296,712 users)
1 indicates a weighted score.
Ranked: #27982
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #416
Members: 535,938
Favorites: 4,179

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Ranked #2798Popularity #416Members 535,938
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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.

Episode Videos

Related Anime

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)


Jan 12, 2024
< Concise review >

Sekai Saikou no Ansatsusha is another controversial, although slightly less so, story from the maker of Redo of Healer. For many of the same reasons Redo of Healer has a much lower average score on MAL than it should have, so does this anime. Unfortunately, the anime fandom is filled with tons of easily triggered helicopter-parented adultchildren snowflakes who get irrationally buttblasted whenever a series doesn't cater to their childish sensibilities.

The truth is this show is one of the better Isekai of its year and does a lot of things right that similar fantasy series gets wrong

-The main characters previous ...
May 5, 2024
Mixed Feelings
The show as a whole is okay, but the story feels kind of lacking. It almost feels like it couldn't decide if it wanted to be an isekai, a romance anime, a harem anime or an ecchi and ended up kind of but not really being all at once, and not in a good way. I can only hope that the light novel is better, because I would be really dissapointed. I want to like the show, but I just can't.
There are a lot of strange unexplained events that seem really off, and there's practically no character development at all. The romance feels like it ...
Jan 30, 2024
I didn't like it at all. I was expecting an anime where the protagonist engages in various battles, but seriously, he doesn't fight even once. He is introduced as an assassin, but doesn't assassinate anyone. There's no character development, just a basic introduction followed by a time skip. The anime tries to sell a skilled protagonist who will do amazing things with his strategy, but the assassinations aren't even properly depicted. In the end, the anime attempts to address many elements and ends up accomplishing nothing effectively. There is no development for any character, including the romantic partners of the protagonist. There are no battles ...

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