Miura, Kentarou

Studio Gaga

Guts, a former mercenary now known as the Black Swordsman, is out for revenge. After a tumultuous childhood, he finally finds someone he respects and believes he can trust, only to have everything fall apart when this person takes away everything important to Guts for the purpose of fulfilling his own desires. Now marked for death, Guts becomes condemned to a fate in which he is relentlessly pursued by demonic beings.

Setting out on a dreadful quest riddled with misfortune, Guts, armed with a massive sword and monstrous strength, will let nothing stop him, not even death itself, until he is finally able to take the head of the one who stripped him—and his loved one—of their humanity.

[Written by MAL Rewrite]

Included one-shot:
Volume 14: Berserk: The Prototype

Berserk

ベルセルク

Samura, Hiroaki

Manji is an infamous swordsman in feudal Japan who is known as the "Hundred Man Killer," as he has killed one hundred innocent men. However, there is something far more frightening than his ominous reputation: the fact that he is immortal. This is the handiwork of eight-hundred-year-old nun Yaobikuni, who placed bloodworms capable of healing almost any wound in Manji's body. 

To atone for his crimes, Manji resolves to kill one thousand evil men. Yaobikuni agrees to this proposal, saying that if he succeeds, she will undo his curse of immortality. Soon after this promise, Manji meets Rin Asano, a 16-year-old girl who requests Manji's assistance in killing those who slaughtered her parents.

Initially reluctant, Manji refuses Rin's desperate plea. However, owing to her evident lack of strength, Manji changes his mind and agrees to protect Rin for four years. With this partnership set in stone, the two embark on a perilous journey of bloodshed, vengeance, and redemption, each to fulfill their own life's cause.

[Written by MAL Rewrite]

Mugen no Juunin

Blade of the Immortal

無限の住人

Matsumoto, Leiji

One year after the events of the First Cycle (Andromeda Arc), Tetsurou has returned to Earth only to end up chained in his home in Megalopolis. It is then that Maetel appears before him once again, offering him the opportunity to join her on a new journey—one she claims will lead him to his destiny.

Ginga Tetsudou 999 (1996)

Galaxy Express 999

銀河鉄道999

Muraeda, Kenichi

There are times when the ambitious nature of human beings has led them to commit unthinkable acts against their fellow men. Red—a young boy of the Wisa Tribe—knows this all too well, having been left behind as the lone survivor after his tribe was massacred by American troops.

Determined to avenge those dearest to him, Red sets out on a journey, during the course of which he encounters Ierou Itou, a Seinan War deserter who made his way to America in hopes of forgetting the people he left behind; and Angie, a young and charming prostitute who has her own share of secrets. Together with his newfound companions, Red wanders the land, seeking to hunt down those who once treated him as prey.

[Written by MAL Rewrite]

Sonoda, Kenichi

On the dangerous streets of Chicago, Rally Vincent not only runs a gun shop under the name GunSmith Cats, but also lives on the edge of the law as a bounty hunter. With razor-sharp shooting skills and driving finesse worthy of the most thrilling Hollywood chases, Rally plunges into a world of ruthless mobsters and powerful criminals with scores to settle that put her life on the line. Every mission tests her limits, but it's the moral dilemmas that threaten to break her own code.

Fortunately, Rally isn't alone. Beside her is a group of loyal companions, including Minnie-May Hopkins: an explosives expert whose turbulent past contrasts with her energetic personality and sharp humor, complementing the pragmatic Rally. Along with trusted allies like Becky and Roy, these bonds go beyond the professional, offering her stability in a world where any mistake can cost everything.

GunSmith Cats isn't just raw adrenaline and intense shootouts; it's a meticulous portrayal of firearms and muscle cars, each depicted with obsessive precision and details, along with a great selection and variety. Kenichi Sonoda crafts a gripping tale of crime and friendship, packed with explosive action reminiscent of classic action films, but balancing harsh realities with heart. In a world where morality is blurred, sometimes the only thing left is to trust your trigger—and the ones who have your back.

[Written by cymogus]

GunSmith Cats

Gunsmith Cats

GUN SMITH CATS

Urasawa, Naoki

Katsushika, Hokusei

Master Keaton introduces Taichi Hiraga Keaton, an archeology professor and part-time insurance investigator known for his successful and unorthodox methods of investigation. The son of a Japanese zoologist and an English noblewoman, educated in archaeology at Oxford and a former member of the SAS, Master Keaton uses his knowledge and combat training to uncover buried secrets, thwart would-be villains, and pursue the truth.

(Source: VIZ Media)

Master Keaton

マスターキートン

Saitou, Takao

Koike, Kazuo

For four decades, Golgo 13 has been the world's greatest assassin for hire - sometimes to settle a private score, and sometimes to change history!

His real name and nationality are unknown - but his legend is everywhere. G13 never fails a job, and never sees his clients again...

...unless they try and betray him!

Golgo 13

ゴルゴ13

Takada, Yuuzo

Through a strange series of events, a young man named Yakumo Fuuji becomes the immortal slave of the last of a race of 3 Eyed immortals. The immortal, Pai, absorbs his soul to save his life, making him immortal in the process. Now, he begins a journey with the female immortal in an attempt to find a way of becoming human. Of course, there are many complications along the way, not the least of which being that the immortal is a female with a split personality, one achingly cute and the other being no-nonsense destructive power, and romances that develop between.

3x3 Eyes

3×3 EYES

In the future, humanity has achieved a vast starfaring civilization, but is slowly and steadily succumbing to ennui or despair, often due to defeat and subjugation by a foreign invader. Rising against the general apathy, Herlock denies defeat and leads an outlaw crew aboard his starship Arcadia to undertake daring raids against Earth's oppressors. Their primary oppressors are the Mazone, a race of organic plant-based alien women who explored Earth in the mythic past and are now back to reclaim it.

(Source: Wikipedia)

Uchuu Kaizoku Captain Herlock

Captain Harlock

宇宙海賊キャプテンハーロック

Matsumori, Tadashi

Uto Yujiro, a Japanese youngster who cross the sea to the home of the Eskimos - a cold &amp; freezing place in northern Alaska, in order to become a top class whaler, but after he met a powerful boxer called Jim, his life's destiny has changed dramatically...

Kenshin

拳神

Otomo, Katsuhiro

Nagayasu, Takumi

Orbiting serenely above a long-ago poisoned earth, the last bastion of human civilization is the space colonies. After a terrorist attack, the colonists are forced into exile on the blighted planet below. In the confusion, a young mother is separated from her family and is flung into a bleak, uncertain future... But Sarah will not rest until she finds her children.

(Source: ANN)

Sarah: The Legend of Mother Sarah

The Legend of Mother Sarah

沙流羅 -The Legend of Mother Sarah-

Miyao, Gaku

Kazan, the only survivor of the Red Sand clan, embarks on a journey to find the water demon that destroyed his people and kidnapped his best friend Elsie. Accompanied by his eagle companion and helper, Kazan meets a mysterious girl by the name of Fawna who has the power to create water from her hands.

(Source: ANN)

12 Manga Like Korogaru Hoshi no Asterism