Well, sometimes, it’s better to leave stories in their original medium.
There are plenty of reasons why these failed, and why any good future adaptation is unlikely as well.
First and most obviously, Mirua’s art is not very fitting for an anime.
The strong shadows and extremely detailed pages have trouble being translated into animation.
The protagonist, Punpun, is drawn as a simplistic doodle of a bird.
The reason this manga will never receive a proper adaptation is similar to Berserk’s reasons.
Inio Asano’s art seems more like it belongs in a graphic novel than a Manga.
The backgrounds are a treat for the eye as well.
Apart from the art just being too good to be adapted, it also works better in static panels.
Also, like Berserk, there’s an issue of content, albeit in a very different way.
5Yotsuba&!
Yotsuba&!, like its name, is an oddball on this list.
It’s a lighthearted slice-of-life manga with very wholesome comedy.
Kiyohiko Azuma has expressly stated that he does not wish for Yotsuba&!
Still, most people who primarily watch anime might not be appreciative of his talents.
This is because, like Berserk, the adaptations his works got were less than ideal.
These manga are a must read for horror fans.
With Junji Ito, the reason is very clear.
His horrifying art style does not work well with how anime is traditionally presented.
The sheer dread that you get from turning a page is absent.
However, Netflix’s Uzumaki seems to be a better adaptation than most expected from the trailers.
It’s similar in nature to Naoki Urasawa’s other critically acclaimed work, Monster.
Monster itself had a difficult time getting adapted, as Urasawa has a very hands-on approach to his adaptations.
However, where Monster did not face a problem is with copyright laws.
Like its successor, Chainsaw Man, Fire Punch does not shy away from the cruelties of its world.
Every taboo is not only shown, but emphasized.
Even in the starting chapters alone, things happen that cannot be put on a TV screen.
Studio Mappa has stated that they’ll adapt every single one of Fujimoto’s works, including Fire Punch.
It’s won plenty of awards, yet it’s never gotten close to getting a much-deserved Anime adaptation.
The reason for that, like with many other entries here, is the art.
Another problem is with the dialogue.
I Am a Hero has panels upon panels without a single word of text.
This works fine with manga, but might not translate well to an animated medium.
Sounen, or shounen, is the most popular manga genre.
Here are the best ones you should read right now.