Under Ninja

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Alternative Titles

Japanese: アンダーニンジャ


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Oct 6, 2023 to Dec 22, 2023
Premiered: Fall 2023
Broadcast: Fridays at 01:43 (JST)
Licensors: None found, add some
Source: Manga
Genre: ActionAction
Demographic: SeinenSeinen
Duration: 24 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 6.921 (scored by 2014020,140 users)
1 indicates a weighted score.
Ranked: #51782
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #2760
Members: 63,487
Favorites: 314

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Ranked #5178Popularity #2760Members 63,487
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Episodes: /12


Once believed to be extinct, ninjas have reappeared in contemporary Japan following the Pacific War. With a headcount rumored to be two hundred thousand, these deadly assassins are now tasked with covert operations, infiltrating a significant portion of the nation's public and private institutions in the process.

Among these ninjas is Kurou Kumogakure, who often spends his days in a run-down apartment with no motivation to do much of anything. Some might consider him a useless vagrant who does nothing but steal beer from his neighbor. Nevertheless, the 17-year-old loser might actually be more dangerous than his demeanor suggests. Kurou's hidden potential is put to the test when he is given a new mission to infiltrate a local high school, but there is more to this assignment than he could ever predict.

[Written by MAL Rewrite]


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Related Anime

Characters & Voice Actors

Kumogakure, Kurou

Ban, Taito

Russian Foreigner

Shinomiya, Gou

Kawado, Ai

Anzai, Chika


Tanezaki, Atsumi

Hachiya, Shion

Yamashita, Daiki


Nakamura, Genta

Yoshida, Akikazu

Ogino, Seirou

Yamada, Mitsuki

Uchida, Aya

Junna's Father



Souma, Kouichi



Opening Theme

Apple Music
Amazon Music
Youtube Music
"Hyper" by Kroi

Ending Theme

"Himitsu (秘密)" by KOTORI


Dec 22, 2023
Under Ninja is an anime watcher's anime. If you have a lot of exposure to anime and have gotten tired of seeing the same tropes and narratives over and over, this is your anime. It's truly unlikely anything else, and it scratches that novelty-seeking itch.

Something you'll notice about users who give this a low score is that they are newer accounts, and probably joined MAL during COVID.

These newcomers have little exposure to anime, which is practically a prerequisite to be able to appreciate Under Ninja's subversion to anything and everything previously established within the world of anime and manga. Newcomers can't know what's being subverted ...
Dec 22, 2023
Mixed Feelings
This Anime felt like a comedy to me with the abusrd things that kept happening and the poor animation quality. I continued to watch it because i found it funny, However the last few episodes are just absurd and not funny anymore. The last episode in particular is one of the most insane episdoes ive ever seen of anime. The show seems self aware in how absurd it is at first and thats what made it feel like a comedy but the last episode is simply insane and tries to add in multiple unexplained plot points at the last moment that it was no longer ...
Dec 23, 2023
Well, good things first: The sound is good. The art is kinda... welll, once you get used too it, it's kinda good and unique. The ehm... let's call it a "Stroy" is also unique in its own way and some characters are funny.
And now the bad things: The whole rest!

As I just said the story is unique. Also, I don't have problems with stories you have to think about to understand everything like in Serial Experiments Lain, King of Thorns, or the Info dumping within the first episodes of Steins;Gate and DURARARA!!
But the difference is that those Anime have a good story and once ...

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Recent Forum Discussion

Poll: Under Ninja Episode 12 Discussion ( 1 2 3 )
Stark700 - Dec 21, 2023
117 repliesby Shiroyasha123 »»
May 6, 3:48 PM
Poll: Under Ninja Episode 10 Discussion
Stark700 - Dec 7, 2023
20 repliesby Tony2Phones »»
Apr 23, 10:25 AM
Poll: Under Ninja Episode 3 Discussion
Stark700 - Oct 19, 2023
29 repliesby Tony2Phones »»
Apr 14, 11:44 AM
Poll: Under Ninja Episode 2 Discussion ( 1 2 )
Stark700 - Oct 12, 2023
57 repliesby RGreatDanton »»
Mar 21, 1:53 PM
Poll: Under Ninja Episode 1 Discussion ( 1 2 3 )
Stark700 - Oct 5, 2023
105 repliesby RGreatDanton »»
Mar 21, 1:40 PM