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: 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
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.441 (scored by 143185143,185 users)
1 indicates a weighted score.
Ranked: #18542
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #565
Members: 310,985
Favorites: 3,117

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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
Dec 22, 2021
G1llette (All reviews)

Somewhere between the release of .Hack and the year of 2013 the isekai genre devolved into a downwards spiral of recycled ideas being vomited out by any studio looking to make a quick buck. The World’s Finest Assassin tries to break free from this cycle, spicing up the genre by making the protagonist a world-class assassin instead of a loser otaku. If that isn’t enough to satisfy you, he’s also an anti-hero with the mission of bringing down the hero of the world. Apparently, any slight change to an isekai is enough to get an A+ for originality from the anime community.

You read more
Dec 22, 2021
KANLen09 (All reviews)
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 read more
Dec 22, 2021
LordSozin (All reviews)

The World’s Finest Assassin Gets Reincarnated into Another World as an Aristocrat is an isekai that’s centered around an old, about-to-be-retired assassin who gets himself killed by the very “organization” he was loyal to during his final mission. Just before he was destined to die, he was reincarnated and placed in front of a god, which the entity tasked him to slay the hero of her realm. As it’s said by the entity herself, if the hero wasn’t slain, the hero would bring destruction and annihilation upon the world in which he saved.

Well, that would have been the plot of the 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
Dec 22, 2021
Xnovazero (All reviews)
Assassin's Creed: The Animation

Let's talk about the heroic story of a nameless man. He has worked for the organization and has lived in a world of killing each other. Quietly, quickly, and kill the target. That's it. He put the organization first and didn't betray his pride. No, it should be called a way to live. His life seems to be plain but actually bravery. Because the underworld didn't allow his well-being. Hard-boiled. The noir life suddenly ended. He reincarnated in various processes. In the post-incarnation world, he decided to live on his own will rather than being used by anyone. It's an opportunity for 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
Oct 28, 2021
Leonies (All reviews)
So far it's just a glorified harem show.

If you can get past the fact that there's only one remotely interesting character that is the MC and that fanservice makes up half the show, then it could be decent.

The sound, art, and story are good, but the fact that it's harem (even though the MC doesn't really show real interest in the girls) just kind of ruins it for me.

It's a nice isekai story and there IS potential but it's disappointing as it's quite clear that they're aiming to appeal to a specific audience that only mostly care about anime girl's visuals and read more
Oct 27, 2021
MugenTsukyomi (All reviews)
This anime is as good as most people want it to be, and unlike other animes that get boring after the first part, each part progresses. Isekai anime with clever main character.
I do not want to say that the story is extraordinary or that it surprises you, but it can not be said that it is boring and I am 80% sure that you will follow it, because the story has good elements such as different skills. And one of the strong points of the story is the philosophy of the family in which the main character was born.
Good art is just like wanting to read more
Nov 18, 2021
BLP_ (All reviews)
In episode 7, the reincarnated middle-aged man is sharing a bed with two children for some reason - one is a busty childhood friend/servant he once saved from animals and the other is a former captive of a sex-trafficking ring posing as his sister - when they wake in the morning, the two girls smell the MC's ejaculate (yes, they smell it) after he has had a wet dream and the two girls offer to take care of it for him next time, lest he become too "pent-up". In a following episode, the girls have told the mother about this for some reason. She then read more
Nov 5, 2021
GrayRealm (All reviews)
I didn't enjoy it.

This show has some high production values in some places, but it is incoherent, as if it is unsure about what it is trying to do.

First there's a fairly stylish intro, which doesn't really match the style of the show afterwards. Then it tediously explains world mechanics. Then there's "splash screeN" of censored breasts (why) of random female character in the middle next to advertisment break. Then it tries to be creepy, then tries to be too dramatic and pushes it too hard, then it tries to be some sort of harem, except that EVERY female character is incredibly stereotypical and read more
Oct 27, 2021
TheSubarashiTeio (All reviews)
The title of this anime is basically the synopsis: World’s Finest Assassin Reincarnated in a Different World as an Aristocrat.

Story: A skilled assassin dies and meets a goddess in the afterlife that’s willing to let him keep his memories in exchange for help dealing with another world. MC agrees to help which is followed by an explanation of the other world and the hero the MC will need to defeat. The twist is that the MC must defeat a powerful hero instead of a powerful demon king. The MC is then reincarnated into the body of an infant named Lugh and retains all of read more
Nov 20, 2021
TruthSpitterTM (All reviews)
Its such a good concept but is so so badly done, this show is simply generic in every aspect. Hella spoilers

From the overdone fantasy landscape, to the harem its overly garbage. The 2 good points in this are before the mc dies and the goddess bits where she checks in on her hero killer. Everything else is pretty awful.

Its kinda like another cop/doctor show on abc, you know its more repetitive garbage tropes but cmon who doesn't wanna watch it. Anyways, I'm not sure if Rui Tsukiyo knows what the words "world building" mean, actually I'm not sure if he's even trying to create a read more
Nov 11, 2021
squintinel (All reviews)
Many people are going around saying how this is super unique for an isekai. I disagree.

I feel like this is just another dumb pity-garnering feel-good show where the OP MC swoops in every episode to save the maiden in distress, then they're eternally grateful to the all-knowing omnipotent MC, in this case under the guise/excuse of "manipulating" their emotions because he's an assassin. The MC's "weaknesses" are very poorly thrown in like when he loses a minuscule amount of ground to try to cover the fact that he is completely OP.

And it happens to be "fate" that he counters a girl that's head over heels read more
Dec 22, 2021
Stark700 (All reviews)
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, read more
Nov 10, 2021
sm00ke (All reviews)
Run of the mill isekai harem, but very overrated. Also quite tedious.

STORY is just boring, or perhaps the execution. Extremely slow with nothing exciting.

ART is good, makes the show look promising at first but everything else is just mediocre.

The show promises action but so far delivers nothing, a shameful waste of the concept really.

Girls are powerless and fall for the main character for no reason, character development is non existent for anyone besides main character, the harem bit is meh.

Dialogue is instantly forgettable.

Honestly this is one of the most boring Isekai out there; no action, no laughs, boring and needlessly slow story, no read more
Nov 9, 2021
lezvie (All reviews)
The concept i hate the most in isekais is the overpowered character. This one is an attempt of making the same anime you probably have seen countless times, but trick you into thinking the main character was well written.

Don't be fooled. Up until ep4, this anime has had a total of zero decently written characters. I didn't read any source material, so i am only looking at the anime. I still don't get why most reviews here say the mc is a good character. Yes, his backstory was interesting, and yes, to our surprise he wasn't a total NEET loser in his previous life. But read more
Oct 27, 2021
Ellenwitch (All reviews)
Isekais can come in various forms, but one thing is for sure, is that they may end up going about the same kind of plotline of MC or a few, get moved to a new world after their death by some kind of god, and are either given the world, or are told to go on an adventure. With more than likely a possible end goal in sight. This is no different, but it puts an interesting twist on the whole thing, of which may interest someone. So let's get talking about it!

You know the drill, character ends up dying through certain means, and such. read more
Nov 18, 2021
thaikick (All reviews)
The main character is given the objective to defeat the hero in order to save the world from total destruction.

Half way into the series and there hasn't been any further mention, let alone any sort of backstory or proper introduction into this key plot area since the goddess - main character dialogue at the beginning. Not even the side characters seem to know of this so-called hero. For a main antagonist in a story, the world-building is practically non-existent and leaves something to be desired, and also isn't helped by the generic representation of the typical settings found in most isekai titles. If this read more