Ajis is a rather new, and lesser known, manga that offers a good story, interesting characters and solid art.

As some other recent mangas, like Shingeki No Kyojin, it does have an overall "shounen" feeling to it but introducing elements of seinen like and increased use of gore and violence, antagonistic figures that go beyond "I want to rule the world because I am evil" and a reduced focus on the frequently used "friendship is power" theme.


Story:

As the preview on the site indicates, Ajin is about people that can't die.
They look and act like normal humans, and most of them don't even realize they are "ajins" until the moment "die" for the first time.

So far, the main focus of the story has been to show that immortality in this case is not a blessing but rather a curse. Most people don't consider "ajins" to be human, they don't have human rights and as soon as one is found goverments from all around the world will hunt them down to capture them and use them as test subjects. As test subject they are victims of brutal experiments and constant torture, a fate that as immortal beings is almost worse than death.

While it's a nice take on immortality I honestly feel this more of a "pessimistic look" on not being able to die rather than a "realistic" look at the issue.
The story shows that before finding out about their power most ajin act as normal humans, they are born, have families, friends and a normal life, it's even said that most of them are not even violent or dangerous even after finding out they are Ajin. Yet we are supposed to believe that no one really feels bad about them and all agree that they are not humans and shouldn't be treated as one. At one point it's even shown that something like 0.0001% of the japanese population seem to be "ajin supporters".

Art:

The art is actually quite good. The overall quality of characters and backgrounds is great and the actions scenes in particular are drawn with a good ammount of detail.

Characters:

The main character feels rather generic but the supporting cast is interesting. The manga is still in early stages so it's hard to talk about character development, but the world is filled with interesting characters of various or unclear motivations that seem to fall on a moral grey zone.

Enjoyment

So far it has been a blast. The story is fun and combines mystery, action and a touch of drama in a world filled with interesting characters. I hardly could finish one chapter without having to start the next one right away

Overall 8/10.

This is showing great promise. like other recent titles it finds a good balance between supernatural, action, drama and mystery all while being presented with a tone that feels a bit more serious and mature than your average shonen manga.
The concept of immortality being a curse is not exactly new and there a few elements I think are not very consisten about the world and how people react to "Ajins". But nothing bad enough to keep me from recommending this.