It can cover many genres too, like fantasy (Berserk), sci-fi (Ghost in the Shell), or mystery thrillers (Erased). However, just as how not every shonen manga gets an anime, some seinen series get left behind on paper too. Whatever the reason for it, here are a few popular entries that currently haven’t been adapted to animation.

8 Billy Bat

Running from 2008 to 2016 in Morning magazine, Naoki Urasawa and Takashi Nagasaki’s Billy Bat is a neat historical mystery thriller about classic comic characters and their artists. Set in 1949, Japanese American comic artist Kevin Yamagata gets famous with a detective comic strip called ‘Billy Bat’. But he thinks he may have subconsciously copied Billy’s design from an image he saw in Japan. So, he returns to the country to officially seek permission to use the character.

Then things get complicated from there, as he ends up pulled into a web of intrigue involving murder, conspiracies, and a prophecy all linked together by this Billy Bat character. It may go back further, and hold more power, than anyone realizes. It’s a surreal premise, somewhat akin to Paranoia Agent with its blurring of fiction and reality. But it was enough for its 20 volumes to catch on with readers and earn multiple awards.

7 REAL

Created by Takehiko Inoue, REAL has been running in the pages of Weekly Young Jump for over 20 years now. It’s also a good benchmark to show what separates seinen from shonen. Shonen sports manga usually center on the action for its drama and thrills. Seinen manga are more about the characters than the fancy moves. In REAL’s case, it’s about how the three leads Nomiya, Togawa, and Takahashi, can live in a society that left them behind.

Takahashi was the captain of his basketball team until he was left paraplegic after an accident. Togawa was on the verge of becoming Japan’s fastest sprinter when he had to get his leg amputated. While Nomiya cares for a woman who was left disabled after an accident he feels he caused. They find a new direction in life with wheelchair basketball, though it’s not a smooth ride as their disabilities and traumas cause trouble they need to work around.

6 Our Dreams At Dusk

Yuki Kamatani’s coming-of-age manga spanned two magazines, Hibana and Manga One, from 2015 to 2018. It was highly regarded too, with Comic Book Resources calling it “beautiful, metaphorical art and a heartfelt story leaving a lasting impact”. While the founder of Yuricon Erica Friedman said it was “crucial for gay Japanese youth.” Yes, it’s about LGBTQ+ people and the issues they face.

It follows Tasuke Kaname, a teenager who gets outed when his high school classmates find gay adult content on his phone. Humiliated, he’s about to leap from the roof of his school when he sees someone jump from the window of a nearby building and come out unscathed. He goes there and discovers it’s a drop-in center for people to talk openly about their problems. He becomes a regular visitor, and meets other LGBTQ+ people in the process, gradually learning to accept himself and his sexuality.

5 Holyland

If Our Dreams at Dusk is a little too sweet, this manga will give readers something with some edge. Kōji Mori’s Holyland ran in Young Animal, the same magazine that published Berserk, across the 2000s. Its lead character, Yū Kamishiro, is an outcast abused by his peers at school. Frustrated, he drops out and takes to the streets, where he feels more at home. There’s something about the lawless brutality that clicks with him.

He sharpens his fighting skills, particularly one boxing-style strike, and makes a name for himself as the ‘Thug Hunter’. As he gets stronger with each beaten competitor, he feels he’s getting close to his peak: his ‘Holy Land’. The series never got turned into an anime. Yet it did become a live-action TV drama…twice. Once in Japan for 13 episodes in 2005, then in Korea in 2012 for 4 episodes.

4 Oyasumi Punpun

Inio Asano is no stranger to dark and harrowing tales, like Nijigahara Holograph and A Girl on the Shore. His most popular strip, Oyasumi Punpun, is a slice-of-life drama about a boy called Punpun Onodera, his family, and his friends. They’re often drawn as cartoony birds to contrast with mature subjects like loneliness, depression, cults, and more. Needless to say, Punpun’s life isn’t all sunshine and rainbows.

What’s particularly harrowing is when Punpun tries to seek solace in ‘God’, who he sees as a photorealistic human’s head with an afro that encourages him to do bad things. How can Punpun come out of that well? Readers could find out in its 13 volumes via Viz Media, if they missed its original 2007-2013 run in Weekly Young Sunday and Weekly Big Comic Spirits.

3 I Am A Hero

Drama is all well and good, but how about a horror story? Kengo Hanazawa’s I Am a Hero is about Hideo Suzuki, a 35yr old manga assistant suffering from low self-esteem and hallucinations. He feels stuck in a rut with no place in the world, just as the world ends. Japan gets struck by a viral outbreak that turns people into homicidal cannibals. With only a shotgun in his hands, Hideo tries to escape Tokyo and the zombielike hordes.

He meets some uninfected people along the way and learns the hard way what it takes to survive. It’s kind of like The Walking Dead, but it goes further as the virus does more than turn people into zombies. The series ran from 2009 to 2017 in Big Comic Spirits, and also had 3 spin-offs set in Osaka, Ibaraki, and Nagasaki. None of which became an anime. However, the prime series did become a live-action film in 2016.

2 Vagabond

If REAL and seminal basketball manga Slam Dunk wasn’t enough, Takehiko Inoue also made his name with this historical epic. Vagabond is his manga adaptation of Eiji Yoshikawa’s novel Musashi, a fictionalized retelling of the famous samurai Miyamoto Musashi’s life story. From his legendary battles against Baiken Shishido and Kojirō Sasaki among others, to his treks across Japan, it has more than enough sword swinging and beautiful art for everyone.

Unfortunately, it’s also incomplete. Inoue started the manga in 1999 in Morning magazine, then put it on hiatus in 2015. There’s currently no news on whether it’ll go back into production. It’s a shame, as it’s won multiple awards from the Tezuka Osamu Cultural Prize to the Best Writer/Artist at the Eisner Awards. There are some alternatives to look out for until it comes back (if it comes back). But Vagabond is a unique experience.

1 20th Century Boys

This list started with a manga by Naoki Urasawa, so it might as well end with one. His most famous work, 20th Century Boys, ran from 1999 to 2006 in Big Comic Spirits and got adapted into a trilogy of live-action films across 2008-2009. But it never got animated. It’s about a group of young boys in 1969 who play around together in their ‘secret base’. They literally symbolize their friendship with a logo, then write a little story called the ‘Book of Prophecy’ where they save the world in the future.

Then 30 years later Kenji, one of the boys, discovers a plot to spread a virus throughout city centers. He tries to stop it but is presumed dead when it gets released…only for a mysterious person called ‘Friend’ to distribute a vaccine for the disease through his political party. No one knows who he really is as he wears a face covering with the boys’ Friendship logo on it. Who is he? What does he and his party have to do with the boys and their ‘Book of Prophecy’? Find out in the English prints by Viz Media.

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