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Destroy thy Neighbor! A gate to another dimension has burst open, and invincible monsters called Neighbors invade Earth. Osamu Mikumo may not be the best among the elite warriors who co-opt other-dimensional technology to fight back, but along with his Neighbor friend Yuma, he’ll do whatever it takes to defend life on Earth as we know it.

Upstanding Osamu always does the right thing, whether it means pitching in to save Earth after school or turning the other cheek to bullies. But when he meets a feisty humanoid Neighbor named Yuma, everything that he thinks is right is turned on its head. Can the two natural enemies ever become friends?

189 pages, Paperback

First published July 4, 2013

65 people are currently reading
826 people want to read

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Daisuke Ashihara

54 books58 followers

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Displaying 1 - 30 of 108 reviews
Profile Image for Bibliophile Cat.
79 reviews12 followers
September 22, 2020
Re-read

This is one of my favorite series and it will always hold a special place in my heart. It's brought me so many hours of happiness (and anxiety, let's be real. XD), and distracted me when I was at my lowest.
It felt so good to reread it, this time in physical form! Because I know everything that's going to happen, I got to read at a slower pace and simply savor the story. Examine the different panels closer, pay more attention to characters actions and thoughts, catch little details I missed the first time.

First read

K, I think I've found my new favorite manga!
Well, fine, so mayyyybe it's a bit too early to say that as I'm ONLY seven chapters in but I'm enjoying it so much so far! I mean, the art is great, the story is intriguing (so many unknowns!), and I love the characters.
Speaking of the characters, we have our mc, Osamu, who appears on the surface to be an unremarkable student. But that surface hides a brave and just-hearted person who won't hesitate to put himself in danger to save others, even though he is weak and knows he could die. There's much more to him than meets the eye, I think. Right now, he is striking me as quite mysterious 👀
and THEN we have Yuma, who is equal parts a very smol and a very dangerous cinnamon roll. You want to protect him but also, don't give him a reason to fight you cuz he won't hesitate to break bones (literally). watching his and Osamu's developing friendship is lots of fun.

anyway, I'm happy I discovered this manga and I'm looking forward to seeing where things go next and finding answers to all the questions I have.
Profile Image for Jennifer.
3,104 reviews66 followers
July 29, 2015
I'm behind the curve on picking up this title, which is apparently super popular.

I was surprised by this title. It has action and seems to be building towards becoming an immensely fun/entertaining shounen action manga, and the premise seemed like something we've seen many times before (giant monsters attacking a city in Japan, ::yawn::). However, I enjoy this take on the common storyline. The fact that Yuma is an alien, and Mikumo is a stereotypical straight arrow basically dreaming of becoming a superhero puts a different twist on things. I got a kick out of the oddball big brother-little brother and native-educating-alien dynamics.

I also liked the fact that Yuma is an alien allows for a springboard of questioning the status quo and Mikumo's straight-laced idea of what is "right" and how people should behave. Yuma's weird violent behavior due to culture shock alludes to the fact that oftentimes the "wolves" in society are the ones who benefit from others following social norms and laws (i.e. "sheep"). It's interesting that, although Mikumo exhibits the righteousness, willingness to turn the other cheek (literally in his case), and self-sacrifice that traditionally characterize a "hero," that he comes off as silly and impotent, as opposed to Yuma, who, though a cute-looking character, has been tempered by war and is expediently practical, and therefore successful when it comes to fighting neighbor soldiers.

The parallels to modern warfare are also intriguing, and whether it was intended by the creator or not, I couldn't help but thinking that the kids in Mikuno's class are like Americans. Some have suffered the loss of family or friends due to the war, but they are largely shielded from any ground fighting. This changes when neighbor soldiers start spawning all over the city, making me wonder if the creator wanted to conjure ideas about drone bombings, urban warfare in the Middle East, and/or Japan's historical trauma after the atomic bombs were dropped. (Probably not to a large extent, but that's what I ended up thinking about!)
Profile Image for Eden Grey.
295 reviews74 followers
February 12, 2015
World Trigger is a very Shonen Jump-style manga. The characters follow certain tropes, but each have their own slightly unique aspects. The action is flashy and large-scale, but not very thrilling or suspenseful. Instead, the reader is drawn to the cool weapons and interesting character and monster designs. The high level Border agents are flashy and cool, but there are a lot of them. Each volume of the English manga features extra content and the original character designs and backstories of most characters, which makes it easier to keep track of them all.

I really liked the futuristic city setting, with its isolation and personal defense force – it reminded me a lot of Attack on Titan and Neon Genesis Evangelion. The neighbors are cool monsters, but not too creepy and not gory at all. The hints of secrets and mystery about the world the Neighbors come from is a definite page-turning aspect, and will keep me reading
Profile Image for Lindsay.
2,982 reviews95 followers
September 14, 2023
An interesting premise. Things aren't what they appear at first glance.
Profile Image for Doc.
1,959 reviews30 followers
November 23, 2015
This book is rated teen according to the people at Viz Media and it might have something to do with the theme of fighting nigh unstoppable creatures from an alternative dimension and the violence that happens in these conflicts (of course that is all covered by the description of the book when you open up this entry.) There is some violence none alien damage considering one character gets his arm cut off and impaled (thanks to their triggers they heal when they revert to normal it seems) and there is a scene where a bully's leg is broken so you be the judge of whether you want a younger reader to read this book that I really enjoyed personally.

This story is kind of like a trans dimensional Odd Couple where straight guy and valiant defender of the weak (though not very strong himself) Osamu and the relatively naive and very honest (but very strong) Yuma who comes from the same place all of the monsters have been invading from but became friends with Osamu and helps when he can. We also get to meet some members of the elite part of the Border organization which protects the people from the Neighbors and Yuma has to do his best to not draw attention to himself. This book has a great balance and action and humor and I hope you enjoy it as much as I did if you chose to start this series. :)

My personal favorite scene in this book is when Yuma exposes the large amount of money he has and a bully bumps into him and says his leg is broken so he wants a lot of money for the hospital. Well this might be a bit of a spoiler but after a moment Yuma Breaks the guys leg and hands him the money fir the hospital. After all it wouldn't make sense to give him money unless the guy's leg was really broken. :)
Profile Image for Dylan.
995 reviews4 followers
August 13, 2015
Great start to an entertaining new shonen title! So looking forward to getting more volumes. I find the art and characters to be delightful! Duck faces!!! Highly recommend this if you like Dystopic storylines and action.
Profile Image for Ericka.
277 reviews14 followers
February 11, 2016
Tries too hard to be like Attack on Titan right down to the uniform designs of the BORDER agents. Main characters are kind of annoying and flat. The art isn't bad, though.
Profile Image for Iván Alvarado.
Author 2 books40 followers
November 3, 2025
Este primer tomo inaugura una historia shōnen con muchísima acción y un mundo que promete dar mucho de qué hablar.

Como suele pasar en este tipo de series, los primeros personajes parecen seguir arquetipos conocidos… pero enseguida se desmarcan. Cada uno tiene una personalidad bien definida y una dinámica muy divertida entre ellos, algo que se agradece. Nos podremos encontrar escenas muy cómicas y que nos van a hacer sacar una sonrisa en múltiples ocasiones.

La historia arranca con fuerza, literalmente desde las primeras páginas, y no da respiro. Combina combates muy visuales con estrategia, ya que los protagonistas deben usar tanto la cabeza como la fuerza para enfrentarse a los Neighbors, esas criaturas que aparecen a través de portales misteriosos.

Aún queda mucho por descubrir, pero hay algo en esos Neighbors que me tiene intrigado. Se nota que detrás hay un trasfondo más grande, con secretos por desvelar, y eso me encanta.

Esa ligera y sutil ambientación futurista de la ciudad me ha encantado, ya que ofrece esa sensación de aislamiento y defensa constante ante algo desconocido y mucho más grande. Algo a lo que la humanidad no está realmente preparada. Y esas son las historias que realmente me gustan.

En definitiva, un primer tomo muy prometedor, con acción, misterio y personajes con mucho potencial.
Estoy deseando ver qué nos espera en los siguientes volúmenes.
Profile Image for Lu.
212 reviews1 follower
February 13, 2021
3.5!
Really enjoyed this :) there’s some fun little characters coming along and the concept is interesting!!!! Interested to see how it continues
1,026 reviews10 followers
November 9, 2014
I don't think this is a bad story. I suspect there are some interesting things here, and that the story could go in some fascinating directions. I don't think the characters are bad, the art is fine, the writing is okay. There's nothing wrong here. There's nothing that would make me flag this and say people might not want to pick it up.

But man... I dunno. It felt really predictable. I was bored reading it. Monsters are coming into our world, certain people are trained to fight against these monsters, and we get to follow a random high school kid. So... was anyone really surprised by what that kid turned out to be? Or who the new kid turned out to be? Or that there's more to these monsters than we might initially think? Or that one of the first people we meet in the defense program would be jealous of a newcomer and weirdly superior about her own abilities? I feel like I read this before with slightly different trappings. And I feel like I *must* be missing something, because people keep talking about how fresh and original it is.

I mean, if you're familiar with Attack on Titan, or Blue Exorcist, or D. Gray Man or heck, even something like Rahxephon it feels like this is treating the same tropes without a unique twist. And I'm sorry, but I just can't care about that anymore. This is a one and done for me.
Profile Image for Selena Pigoni.
1,934 reviews264 followers
January 1, 2015
This is one of those manga where you're not sure if a lot of things happened or not a lot of things happened.

It feels like a lot happened, but then you think about it and go, "But they only had two battles. Huh."

I liked it. It doesn't feel like it's rushed, but it's not going at a slow pace either. There's a lot of detail to pay attention to, so those of you who like world building will get it in abundance.

It's kind of your typical shounen so far, but I'm digging it.
Profile Image for Elinor.
1,380 reviews37 followers
June 10, 2024
Un très bon premier tome ! J'avais entendu peu de choses, mais des choses très positives, sur cette série, et je suis bien contente de les avoir écoutées ! du bon shonen comme je les aime, et même pas trop classique pour l'instant !
Profile Image for Sesana.
6,239 reviews330 followers
October 12, 2017
Actually a pretty decent shonen. The setup sort of reminds me of Pacific Rim, with monsters from a parallel world coming through portals to wreak havoc. A ton of exposition in this volume, but a lot of action, too.
Profile Image for Amanda Setasha.
1,676 reviews54 followers
March 9, 2017
I honestly wasn't sure what to expect from this series. It kind of reminds me of Pacific Rim with an increased comedy aspect. It's unique compared to most manga plots out there and I like it.
36 reviews
March 3, 2018
World Trigger, while intriguing, fails to actually interest in its first volume. The greatest sin any manga can do without being actively bad is to be boring.
Profile Image for Mallorie Pollok.
30 reviews2 followers
June 13, 2024
I might just not be a comic book fan, but I was confused. No deep connection felt with the characters. But I’ll be generous as this is not my usual genre 😂
1 review
December 13, 2024
*spoilers*
In the manga series world trigger it starts off as many rifts from another world started to causally open up and other dimensional beings called neighbors appeared. Humanity then took technology from the other world to a whole new level. They soon constructed a defense force (border) which is a huge protection institute in which most of the so called (trigger) holders use different forms of weapons corresponding to the person wielding the triggers. Our main character Osamu is a border agent in training who isn’t very social, he is often bullied by the other students but little did they know he is a trigger holder and part of border. The other main protagonist is a new transfer student named Yuma, he is from another world which came through one of the rifts onto earth as he learns to adapt to his new surrounding it is funny to see the logic in his actions since he isn't accustomed to the
Japanese culture even though his father is Japanese. I enjoyed the concept of the war between other species it gives Attack on Titan and a little of Bleach.

I really like how the neighbors look cool but not too monster looking, trying to find out more about what the neighbors are and where the portals they come out from lead. In the book we are introduced by some other border members that protect the people from the neighbors and Yuma tries his best to not draw attention to himself. My favorite scene in the book is when Yuma exposes a lot of money and a bully bumps into him and says his leg is broken so he wants a lot of money for the hospital. A little after Yuma then breaks the bully’s leg then gives him money for the hospital. Another scene i enjoyed in the manga was when Yuma then tells Osuma he is from the other side of the portals.

There are a lot of parts that could be improved like how in a part of the manga Osuma's arm gets completely torn off and gets stabbed then he is okay. Some question like what is the tron used in the triggers that helps them regenerate while using them. I really hope they give Yuma more screen time because he is a lot more interesting and more needs to be explained on what his abilities are and if he can be a danger to the whole border agency.

If you enjoy Attack on titan it gives a really good vibe of it but a little more Sci Fi and more technology than Attack on Titan. The portal in which the neighbors come out of no where and cause chaos shows the confusion and the need to find out more about the neighbors and more about Yumas abilities.


This entire review has been hidden because of spoilers.
Profile Image for Carrie.
154 reviews11 followers
January 15, 2018
4.7/5

**light spoilers? below**

I was really surprised how much I really liked this manga considering that I read much more josei manga nowadays. This one is for the science fiction genre lovers out there. The world has changed, strange holes or portals shale up Japan and bring terrifying monsters. BORDER is an organization that has brought order by battling these creatures, safeguarding places they appear and prepping the surrounding areas for evacuation drills and shelters. (AND *gasp* they're all young people! teenagers so far! ) Osamu is a seemingly plain low level BORDER trainee who is also a highschool student who is wallflowering his life away but secretly doing his Border work. Yuma is the weird new kid who is a shorty and who keeps us laughing throughout the entire volume with his innocent but bizarre musings. (All his expressions are to die for. His grins his duck faces, it's all legit)

Osamu and Yuma work so great together: Osamu a quiet, easy to fade into the background character who no one takes seriously yet whose heart is in the right place and wants to protect people. Yuma, who is revealed to be a "neighbor" brings the laughs as he is masquerading as an ordinary student who is still learning social norms and is as cheerful yet scarily insightful as he can be.

Yuma may come from he other side yet he but he hints that not all neighbors are bad in the way they are presented and portrayed by the media and those humans who fight them--in fact, his kind resemble humans in more ways than most and the monsters that attack Japan are perhaps some kind of abnormal breed or some nefarious creation. This first volume gives us Yuma and Osamu working together to not just save lives but to hide Yuma amongst the crowd: Osamu sees him as powerful but not dangerous in wanting to harm people.

Yuma sees Osamu as weak but still honorable by being duty bound and willing to accept responsibility for his mistakes which could have serious repercussions. Osamu is also someone who Yuma finds who won't run from accountability. It is an interesting pair up and the author manages to weave it all with themes some commentary on war, propaganda and just knowing, or not putting a face to the folks on the other side. Like I said, this one surprised me. I'll definitely read the next volume.
Profile Image for LaPommequirougit.
1,261 reviews50 followers
April 10, 2018
J’ai entendu parler de ce manga, diverses fois, de plus la couverture m’attirait énormément ;).

L’histoire est celle d’une ville dans laquelle un jour, une brèche s’ouvre. De celle-ci arrive des ennemis qu’ils appelleront les Neightboor. Ces derniers vont détruire la ville, tuer beaucoup de personnes, or un groupe de personnes se disant préparer depuis un moment cette arrivée va les tuer et les anéantir. Dès lors une organisation sera créée pour ces personnes et se feront appeler les Border. Osamu est l’un des borders de la classe la plus faible qu’il existe, sauf que celui-ci va croiser la route de Yûma qui n’est qu’autre qu’un neightboor.

J’ai beaucoup aimé dès les premières pages cette mise en abime. Cette opposition entre Osamu, un personnage sérieux et loyal et Yûma qui vient d’une autre culture, d’un autre monde et qui est complètement à côté de la plaque rend cela humoristique. De l’autre, un vrai problème se pose à Osamu. C’est un border, il ne devrait pas couvrir un neightboor, sauf qu’il y a de quelque chose de différent chez Yûma, quelque chose qui lui dit de l’aider.

La fin elle, m’a hyper. Elle ne présage rien de bon et malheureusement je n’avais pas le deuxième tome en ma possession, sinon je l’aurais lu directement !

Osuma est un jeune lycéen, qui est un border de classe C. Il n’aime pas se faire remarquer, il veut être le plus discret possible, le plus tranquille et aider les autres à son maximum.

Yûma lui est un neightboor. Ce qui fait de lui un personnage complètement décalé. En effet, dans son monde, les façons d’agir ou de faire, sont totalement différentes de là où il se trouve. Il va donc plusieurs fois se retrouver dans des situations assez cocasses.

Le style de dessin était super beau ! Un style qui m’a attiré vers le livre avant même de savoir de quoi il parlait ! 😉

En conclusion c’est un premier tome qui m’a complètement séduite. J’ai adoré le personnage de Yûma qui est complètement taré et qui m’a beaucoup fait rire. Le principe de l’histoire est ultra intéressante. J’ai hâte de savoir ce qui va se passer dans le prochain tome. :)

>> https://lapommequirougit.wordpress.co...
Profile Image for The Book Dragon.
2,501 reviews39 followers
February 15, 2020
Rifts to another world open up and the hell-scape on the other side invades our world. To combat it, humanity takes technology from that world, establishes a specialized defense force (Border), and learns how to fight back, effectively containing the opening rifts and the invading 'Neighbors'.

Our main hero, Osamu, is a white-knight Border agent in training. Basically, he's the paragon 'Captain America' style character of this series. Enter Yuma, a new transfer student who doesn't fit in because he's... well... new... to Earth. His point-of-view on things is hilarious because it's all based on logic, trial and error, and literal meaning. And he's OP enough to back it up with brute force if he has to.

This chance encounter puts Osamu and Yuma at the center of an inter-dimensional war where allies could be enemies and enemies could pop up anywhere. Exciting stuff.

We're also introduced to Ai Kitora, the assumed main female of this series, and I hate her. She's snobby and prideful and gets defensive when someone (mostly Yuma) calls her out on her bullshit. Granted, that means she has room for character growth, but without it she's going to be another annoying female character.
Profile Image for Dale Jones.
340 reviews33 followers
April 2, 2019
Earth is under constant threat from Neighbors, invincible monsters from another dimension that destroy our way of life. At least we have the elite warriors of BORDER, who co-opt alien technology to fight back!

Our hero Osamu Mikumo will do whatever it takes to defend life on Earth as we know it. When he meets a feisty Humanoid Neighbor named Yuma, everything that he thinks is right is turned on its head. Can the two natural enemies ever become friends?

This was a fun manga to read. It reminded of a bit of Attack on Titan and Neon Genesis Evangelion without being super dark and depressing. There was some laugh out loud moments thanks to Yuma who is the funniest character I've read in some time. There are parallels to warfare that I found intriguing. Is this suppose to be a social commentary (or rather world commentary) on Japan's historical trauma after the bombings? Who knows?

The Arashiyama Squad is a group of A-Rank Agents who protect the city. My favorite one of the group is Ai Kitora. She's awesome and I hope to see more of her in the future.
Profile Image for Alan.
2,050 reviews15 followers
October 22, 2019
Yep, continuing on looking for a new(ish) manga series to get vested in. Despite all of the cliches that this one brings up, it was just entertaining enough to land on...

The maybe pile.

I think some cultures really have specific tropes that they go to. Some writers will use those tropes, and twist them, or execute them so well that they produce a very entertaining experience. It seems a lot of translated Japanese media (movies, television, and manga) have invasions (often from another dimension), kaiju, and young (or teen) heroes acting in concert to save lives and the day.

Have I consumed a lot of this over time-yes. The question for me here is am I interested enough in what is on the other side of the rift, and its reasons for crossing, to continue on. None of the characters are so interesting as to bring me back (this is no Mai, or Samurai Executioner in that regards).
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