The Most Intense 18+ Anime Series That Are Too Mature For Little Kids

Prison School Girl Violent

How do you define 18+ anime series?

  • By their tag? Some anime in the 13+ range seem too mature for their rating.
  • By how explicit they are? This one is more accurate.
  • By their violence? This one is definitely justified.
  • Or their deep psychological traits? (Mental illness, etc).

No matter how you look at it, some anime are deep, graphic, obscene or a step away from being classified as Hentai

Usually when they’re too Ecchi like Prison School.

Yet some anime get away with safe ratings like 13+ (Food Wars).

So in this post, 18+ relates to profanity, nudity, strong themes and violence.

Here are some anime that match that description…


18+ Mature Anime Series List:


1. Haganai: I Don’t Have Many Friends

mature 18+ anime series

Haganai is a rare series of its kind. I mean, how many slice of life have nudity, and extreme profanity?

The story is about making friends and dealing with loneliness. But what they get up to is in the realm of Ecchi/wtf did I just see.

NOT for kids.


2. Food Wars

The Most Intense 18+ Anime Series That Are Too Mature For Little Kids

That’s right, this is a food/Ecchi series with plenty of “almost naked” scenes and obscene animation.

And Food Wars isn’t shy about its fan service either. Seeing as you see both boys AND girls in the flesh (almost).

13+ is too generous for a rating.



mature 18+ anime series
GATE is about another world that opens up in Japan at random. This leads the story into a direction of both sides (Japan and the other world) calling a truce. Instead of senselessly trying to kill each other.
Trust me when I say GATE is violent. Too violent for kids.


4. Owari No Seraph

mature 18+ anime series

Owari No Seraph is one of the rare demon/monster anime that’s actually good. Like Attack on Titan, the first episode squeezes the emotions right out of your body. And hooks you in.

And what follows from there is NOT at all for little kids.


5. Kabaneri Of The Iron Fortress

mature 18+ anime series

Like Owari No Seraph and AOT, Kabaneri is a supernatural anime. Focusing on humans vs monsters (basically).

It’s nothing new, but how it handles itself is impressive. And the gore is ruthless.

That shouldn’t surprise you once you realize AOT shares the same anime studio as Kabaneri.

Related: 6 Anime Studios That Produce Jaw Dropping Shows


6. Chrono Crusade

mature 18+ anime series

Chrono Crusade, made back in the 2000’s, is a religious/demon anime with a deeper meaning under the surface.

Once you get into it you start to see why it’s not for kids. Both from a violence point of view, and a psychological perspective. As it’s deep, thought-provoking and merciless.


7. Shikabane Hime: Aka

mature 18+ anime series

Shikabane Hime is about Makina Hoshimura. Who’s nicknamed “corpse princess” because she’s dead but alive.

The themes, atmosphere and characters are dark by nature. So if you’re expecting all that “hero of justice” stuff you won’t find it here. With the exception of one character who’s caught up in the middle of the madness.


8. Attack On Titan

mature 18+ anime series

Attack on Titan goes without saying.

The first episode is horrifying. And the soul crushing violence is enough to scare off any kid who dares to watch it.

It might be over the top sometimes, but that doesn’t make it anymore cuter than it is.

Related: Buy Attack On Titan Figures


9. Full Metal Panic

mature 18+ anime series

Full Metal Panic is one of the classic Mecha shows in animes history. With a new season airing now in 2018.

The anime starts off slow, and so does the violence and cruelty. But it’s there, and it’s uncomfortable to watch. Especially once you start getting into the second season of FMP.

That’s when things get really messed up.


10. Code Geass

mature 18+ anime series

Does this even need an introduction?

Code Geass starts off with a ruthless introduction to the story. And that’s NOTHING in comparison to what the chefs of despair are waiting to serve you.

It’s bitter, disgusting, crude, unethical and tasty all at the same time. And you’ll have a love-hate relationship the longer you get to taste what each episode has to offer.


11. Witchblade

mature 18+ anime series

Witchblade is too mature for more reasons than violence. It’s also pretty Ecchi too.

Think of an anime like Kill La Kill, or even Darling In The Franxx. And then add a higher level of violence to the mix. And you basically have Witchblade as the outcome.

It’s forgotten in 2018, but I’d recommend it if you want something different.


12. Eureka Seven

mature 18+ anime series

On the surface this anime is all the way Mecha. Plus romance is a consistent theme running throughout this series.

But once you gain some traction and get a little deeper, you start to understand something else.

And that something is:

  • Eureka Seven is surprisingly violent.
  • It goes deeper than most shows of its kind, and makes you ask yourself all sorts of questions.
  • And the 13+ rating given to this show is misleading.

I wouldn’t even recommend this for a 13 year old. Never mind little kids. It’s too deep (but that’s why it’s one of my favorites).


13. Elfen Lied

mature 18+ anime series

Want to see a dog get tortured, beaten to death, while the culprits laugh as if they’ve just finished watching a comedy show?

This isn’t even a tip of the ice bergs toe nails when it comes to what Elfen Lied has in store for you.

It’s a sad show, and it’ll make you think about how disgusting some human beings can truly be.


14. Bungou Stray Dogs

mature 18+ anime series

One thing I’ll say about Bungou Stray Dogs is: it’s weird! 

Tons of the characters are either freaks, eccentrics, weirdo’s or mysterious. There’s something to be said about the level of violence and depth to parts of the story too.

NOT for kids!

Related: 11 Anime Characters Who Take Eccentricity To A Whole New Level


15. Fate Apocrypha

mature 18+ anime series

If you’ve watched any Fate series, you know how violent they are (Fate Stay Night excluded).

Fate Apocrypha is the latest series in the world of Fate. And like Fate Zero, it doesn’t hold back. So expect to see be-headings, hard to swallow episodes, and some depth to make it all interesting.

Related: Buy Fate Apocrypha Figures


16. Fullmetal Alchemist: Brotherhood

mature 18+ anime series

Fullmetal Alchemist is a lesson in self-control. When you lose self-control, you do stupid sh** that’ll put you in harm’s way.

The anime shoves this truth down your throat the first few episodes. And later as the story gets deeper, you start to see the dark side of the Military, human struggles and similar themes too mature for little kids.

Related: Fullmetal Alchemist Figurines


17. Btoom!

mature 18+ anime series

Btoom! isn’t a favorite. I don’t even like it. BUT the uncomfortable violence and outrageous scenes make it worth mentioning.

Some scenes are too graphic and intense to be watching with little kids. It would be wrong to suggest otherwise.


18. God Eater

mature 18+ anime series

Graphical action/fantasy anime with disturbingly violent scenes showcased in CGI animation.

Of all the 18+ anime I’ve watched, God Eater is hands down one of the more uncomfortable shows to watch. Which is surprising considering it’s only 12+ episodes long.


19. Danganronpa

mature 18+ anime series

Danganronpa isn’t 18+ for its bloodshed or senseless violence.

No, it’s the psychological elements that makes Danganronpa too mature for little kids.

The anime takes pleasure in trapping unsuspecting kids in a prison-like-school, and then forcing them to fight for their lives to survive.

And in the process you witness the psychological breakdowns of more than a few characters. With death being their final destination.


20. Black Lagoon

mature 18+ anime series

This gangster-like anime series goes without saying. It’s gritty, dark, and bred straight from the gutter.

Even the main character is literally born and bred in the gutter of New York City.

If diving into the depths of darkness makes you curious, Black Lagoon won’t disappoint. And it looks good doing it.

Related: 9 Meaningful Anime Shows That Reflect Real Life Problems


21. Jormungand

mature 18+ anime series

This anime will teach you about the dark underworld of an arms dealer, a person who funds wars for a living.

And it’s a realistic representation of what happens in real life. Making the experience of Jormungand even more depressing.

If you want a more “realistic” representation of the underworld, watch Jormungand. It takes it a step further than Black Lagoon, but they’re both still unique in their own way.

Related: 12 Powerful Jormungand Anime Quotes That Are Unforgettable


22. Gantz

mature 18+ anime series

Gantz is even worse than Haganai: I Don’t have Many Friends for its profanity.

In fact it’s even worse than Black Lagoon (or on par) for its foul language.

It’s not the most loved series, but it’s dark enough and too cutthroat for little kids to be watching it.

Honorable Mentions: 

  • Tokyo Ghoul.
  • Future Diary.
  • Akame Ga Kill.
  • Taboo Tattoo.
  • Another.
  • Prison School.
  • Parasyte.
  • School Live.
  • Shiki.
  • Kino’s Travels (and Kino’s Journey).
  • Higurashi: When They Cry.

21 thoughts on “The Most Intense 18+ Anime Series That Are Too Mature For Little Kids

  1. Rummy says:

    i dont see Hellsing Ultimate and Castlevania

  2. Yup123up says:

    What about shimoneta lol
    Why did I bring this up

  3. Amelia Woo says:

    Jormungand caught me by surprise. Thank you for sharing this!

  4. Thomas C says:

    Some of the ones on your list aren’t even that bad.
    FMA brotherhood, Eureka seven,Full metal panic, owari no seraph, any of the fate series i’ve seen, kabaneri, gate, code geass, food wars, chrono crusade and even attack on titan I would say are all suitable for 13+. On the other hand things like black lagoon, elfen lied,gantz, prison school, future diary, another, higurashi, Sekirei and akame ga kill I would say are not for sure.

    • Theo Ellis
      Theo J Ellis says:

      But neither are for KIDS. 13+ is the teenage bracket (kids are younger).

      It’s a good observation none the less.

  5. Joseph E South says:

    Freezing can be pretty uncomfortable to watch especially the first few episodes.

  6. Vivek says:

    Did you heard about death note?


    I agree with most of everything on this list, but another thing to keep in mind, is that some kids can be really mature.

  8. Xenon says:

    uum kill la kill anyone??

  9. Marcus says:

    King’s Game is dope. Check that one out.

  10. Ilgmars says:

    Yeah and where is Keijo?

  11. Aryan lanjrwar says:

    Were the f*** is prison school

    • jordan says:

      it is an honorable mention

  12. musahaf says:

    where the f*ck is high school dxd, shimoneta, and supernatural the anime

    • Kuro says:

      Right XD, and boku no pico

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