Hiroe, Rei

Rokuro Okajima is just an average Japanese salaryman, living an average life. But when he's taken hostage by the crew of the Black Lagoon, Rokuro finds himself thrown headfirst into a deadly world of outlawed heroes, brutal villains, and blazing gunfights. Where he ends up is anyone's guess, but one thing is for certain—he's in for a wild ride!

(Source: VIZ Media)

Black Lagoon

ブラックラグーン

Fukumoto, Nobuyuki

While mahjong is a game that is often played with family and friends, it is also a game that is played in the darkest corners of society. Nangou is a compulsive gambler who has accumulated a debt of over three million yen. In a last-ditch attempt to clear his record, he decides to wager his life on a game of mahjong with the mafia. Unfortunately, as the game progresses, Nangou only moves further from the prize and closer to death.

When all hope seems lost, the game parlor is suddenly intruded upon by Shigeru Akagi, a young boy on the run from the police. Desperate to turn the game around, Nangou hands the game over to Akagi after teaching him a few of the rules. The mafia can only smirk as Akagi sits down to play. However, they soon come to learn that Akagi is a natural-born gambler. An imposing figure who does not fear death. One who is destined to become a legend.

[Written by MAL Rewrite]

Akagi: Yami ni Oritatta Tensai

アカギ ～闇に降り立った天才～

Kohske

In the crime-ridden city of Ergastulum, there exists a group of humans with super strength and speed dubbed "twilights." These twilights define the city with their constant tension with normal humans, and powerful factions of the town—the Corsica Family, the Monroe Family, the Cristiano Family, and the Paulklee Guild—use them as a means to maintain the fragile balance that exists within the city.

Enter the charming human Worick Arcangelo and the deaf twilight Nicolas Brown, two long-time friends and business partners of the neutral group "The Handymen." Working as muscle-for-hire, they are willing to take almost any job asked of them in order to make ends meet. One day, they find themselves receiving a seemingly regular job from the police: kill a rival pimp and his prostitute. However, this job is not all that it seems, as it takes the pair down a dangerous path and triggers events that could change the very framework of Ergastulum forever.

[Written by MAL Rewrite]

Gangsta.

GANGSTA.

Kim, Jung-Hyun

Im, Lina

After devoting his life to the crime organization, Glory Club, Peter retires his status as a legendary killer and spends his remaining days running a quiet used bookstore. But after being ambushed and nearly killed one day by the very organization he dedicated his life to, Peter finds his body magically reverted back to its teenage years. Now that Peter was back to his peak physique, he sets out to settle the score with Glory Club.

(Source: Webtoon Entertainment)

Killer Peter

킬러 배드로

Jeong Yeon

Shin Kim is a special killer who gathered men from all over the country and made the organization "Baek-Yi" to destroy the absolute power "'Castle" of the underworld. Through a negotiation he got inside Castle and started working with the enemy... Will Shin be able to take down Castle and complete his revenge as he hoped?

(Source: Naver, translated)

Castle 2: Pinnacle

캐슬2:만인지상

Oh, Se-hyung

Kim, Gyuntae

As the toughest fighter in the world of crime, Gijun claims victory in a battle that ends the long power struggle between Seoul's gangs. But when his brother Giseok rises in rank within the enemy group, Gijun decides to slash his own heel and leave the business to avoid fighting him. Just when all seems at peace 15 years later, Giseok is mysteriously ambushed and killed in cold blood right before his own retirement. Filled with a chilly rage, Gijun sets off on a one-man hunt to track down everyone involved in his brother's death. And he has a feeling he doesn't need to look far to find the main culprit... With revenge and old gang rivalries factoring into the equation, Seoul's underbelly is in for yet another grisly bloodbath!

(Source: Tappytoon)

Plaza Wars

광장

Murata, Yusuke

After rigorously training for three years, the ordinary Saitama has gained immense strength which allows him to take out anyone and anything with just one punch. He decides to put his new skill to good use by becoming a hero. However, he quickly becomes bored with easily defeating monsters, and wants someone to give him a challenge to bring back the spark of being a hero.

Upon bearing witness to Saitama's amazing power, Genos, a cyborg, is determined to become Saitama's apprentice. During this time, Saitama realizes he is neither getting the recognition that he deserves nor known by the people due to him not being a part of the Hero Association. Wanting to boost his reputation, Saitama decides to have Genos register with him, in exchange for taking him in as a pupil. Together, the two begin working their way up toward becoming true heroes, hoping to find strong enemies and earn respect in the process.

[Written by MAL Rewrite]

One Punch-Man

One-Punch Man

ワンパンマン

Tanaka, Yoshiki

Katou, Naoyuki

Kamoshita, Yukihisa

In the far future, two young military leaders rise above their peers. The invincible genius Reinhard von Lohengramm is matched only by the unbeatable magician Yang Wen-li; though the two share a profound respect for each other, they meet on the battlefield not as comrades but as bitter adversaries. Commanding thousands of warships and millions of soldiers, they lead giant space fleets into battle on behalf of the two interstellar states that have wrested for control of the Milky Way for over a century and a half. 

The Galactic Empire, an absolute monarchy ruled by Kaiser Friedrich von Goldenbaum IV and an entrenched nobility, seeks to suppress the rebels daring to oppose the inviolable crown. The Free Planets Alliance, a representative democracy led by a corrupt High Council, degenerates as its elected leaders⁠ use war and conflict as a way to win popular support. Reinhard is a minor noble who became a High Admiral through his strategic brilliance and his sister's position as the favored concubine of the Kaiser, while Yang is an avid historian and reluctant commodore hailed as a hero despite only using his tactical prowess to navigate around his leaders' incompetence. On opposite sides of the galaxy, the two men have wildly different visions for the future: Reinhard dreams of uniting mankind under his iron fist, while Yang wants only to carve a path to lasting peace. As the war rages on, Reinhard and Yang each strive for their ideals and secure their place among the stars as the leaders of a new era of galactic heroes.

[Written by MAL Rewrite]

Ginga Eiyuu Densetsu

Legend of the Galactic Heroes

銀河英雄伝説

Yoshida, Akimi

Ash Lynx is a beauty, a genius—and a murderer. Since childhood, he had been in the care of Dino "Papa" Golzine, the mafia boss who turned him into the ruthless killer he is now. At first, Ash was just a pretty face for Golzine's pleasure, but now estranged from him, a 17-year-old Ash runs his own gang with an iron fist.

Eiji Okumura is a young Japanese photographer. Traveling to New York as an assistant, Eiji is set to work on a report about kids living in the streets. There, he meets teenage gang leader Ash and is mesmerized by the boy—who in turn is curious about Eiji's different lifestyle.

But this is the dark underground of New York, and recently a series of murders has surfaced in the city, connected only by the words "Banana Fish." With personal stakes in this mysterious battle, it is up to Ash, Eiji and their allies to discover what exactly "Banana Fish" is, where it came from and how to get rid of it—before the world as they know it descends into chaos.

[Written by MAL Rewrite]

Banana Fish

BANANA FISH

Chugong

Jang, Sung-rak

Disciples

Ten years ago, "the Gate" appeared and connected the real world with the realm of magic and monsters. To combat these vile beasts, ordinary people received superhuman powers and became known as "Hunters." Twenty-year-old Sung Jin-Woo is one such Hunter, but he is known as the "World's Weakest," owing to his pathetic power compared to even a measly E-Rank. Still, he hunts monsters tirelessly in low-rank Gates to pay for his mother's medical bills. 

However, this miserable lifestyle changes when Jin-Woo—believing himself to be the only one left to die in a mission gone terribly wrong—awakens in a hospital three days later to find a mysterious screen floating in front of him. This "Quest Log" demands that Jin-Woo completes an unrealistic and intense training program, or face an appropriate penalty. Initially reluctant to comply because of the quest's rigor, Jin-Woo soon finds that it may just transform him into one of the world's most fearsome Hunters. 

[Written by MAL Rewrite]

Solo Leveling

나 혼자만 레벨업

Nakamura, Yoshiki

Life in the year 2020 in Tokyo is tough, as crime rates are high, and crimes against women rank second only to murders. To prevent their daughter from being exposed to these crimes, Tsukasa's parents raised her to be a male. Tsukasa aspires to be a policeman fighting against the yakuza, just like her parents. However, her parents died in the line of work, leaving behind Tsukasa and her 3 brothers to fend for themselves. Tsukasa must thus work as a bodyguard for her classmate, Ryuji, who happens to be the leader of the most powerful yakuza group in Tokyo, to pay off the family's debts.

(Source: ANN, edited)

Tokyo Crazy Paradise

東京クレイジーパラダイス

Hirano, Kouta

For centuries, many secret organizations have taken part in exterminating various types of dangerous monsters. One of them is the England-based Hellsing, run by its cunning leader, Sir Integra Fairbrook Wingates Hellsing. Her greatest hunter, and trump card, is Alucard, an unbeatable vampire genetically modified by her father. Despite him being one of "them," he swore to be her protector and servant.

A new crisis begins and with the help of Seras Victoria, his recently turned vampire partner, Alucard has to uncover the truth behind the mysterious vampire attacks. Not every human is bound to be his ally in this battle, and he will not hesitate to kill anyone who stands in his way.

[Written by MAL Rewrite]

12 Manga Like Castle