Black Jack is a genius surgeon who never acquired his license due to his clashes with the medical establishment. He is hired out by anyone willing to pay his exorbitant rates and is perceived as a heartless rogue because of his enigmatic nature and antisocial manner but that is not the whole story.

Note: 8 previously-sealed chapters were republished and were never officially nor unofficially translated.
Won the 1st Kodansha Manga Award in the Shounen category in 1977 which was tied with Mitsume ga Tooru.

Using Tezuka's characters, the very best artists were allowed to let loose and adapt his characters into short stories.

from fictiondb:
The billionaire's bedroom bargain...

Jack Maguire was turned away from his father's house and has never forgotten that day--or how much he wanted his stepsister, Sally. Now a billionaire tycoon, by a twist of fate Jack's inherited his father's property-- and has an opportunity to get revenge....

Jack has a bargain to make with Sally, who has grown into a beautiful, desirable woman. She can keep her beloved house...if she will be his mistress on weekends!

The genius surgeon calling himself Black Jack has grown old and while his skill is sharp as ever, he's now fighting an illness of his own. At times he falls into comatose state from which he won't wake up for roughly thirty hours. Yet, his unparalleled skill with a surgical knife is still in high demand. His current case leads him into dictatorship country slowly falling into ruin as its Supreme Leader is gravely ill...

Japan is now the 51st state of the U.S.A..
The isle of Neon, located near Japan, is the only place where prostitution and gambling are legal. There, Italian Mafia, Chinese Triad and Yakuza fight each other to gain the control of casinos and brothels.

Hoshino Teru, a mediocre middle school boy has a crush on Amamiya, his childhood friend. However, "Micchan" stands between them, and brings chaos upon Teru's life.

From Blu:
Black Knight, the highest honor that can be bestowed upon a knight in the kingdom of Aran. Sieg O’Brian may have his eyes on the title of Black Knight but he’s also after another prize, the young prince, Chris. Black Knight is a sweeping romantic fantasy epic about the relationship between the prince of a medieval kingdom and his loyal guardsman. Our story begins when Chris and Sieg meet in military school and embark on a life-long relationship fraught with danger, treachery, and above all, love.

Bat has returned to her birthplace, Rainbowria, where her mother grew up. The 17-year-old Bat, as the princess of the Black Knight Queen, has roused the sealed Starship from its sleep. The story follows Bat's adventures in the mysterious Starship.

Lock n' load with the baddest soldiers of fortune ever to hit the high seas of Southeast Asia! Aboard their World War II era torpedo boat, the Black Lagoon, Dutch the Boss, Benny the Mechanic, Revy Two Hand, and Rock, the salaryman from Japan, deliver anything, anywhere. In the dangerous underworld of the Russian Mafia, Chinese Triads, Colombian drug cartels, crazed assassins, and ruthless mercenaries, it's hard to know whom to trust. But if you've got a delivery to make, and you don't mind a little property damage along the way, you can count on the crew of the Black Lagoon.

A high class all girls school that grooms their students to become a proper lady with manners… or so it should’ve been. But somehow the public morals is a bit loose… the proud honour student, lily is giving the students [freedom] in the school?! A yuri comedy comic!

Humans are always evolving. The ones who evolved in the right path would embody superpower, and called the "White." However, the when their psyche can't keep up with the evolution of their body, they'll lose their mind and go berserk. They are called the "Black." Jin is a part of Black Line; the security company against the Black. Jin swears to eliminate all the "Black" from this world–– wether by finding a cure to end the spread of the "Black," or with his own fist and power. (Source: MangaHelpers)

From Dark Horse:
It's a time in the future -- a time where the creation of life itself has evolved to include biodroids named after the ancient Greeks and cyborg warriors programmed to destroy. The power struggle between the various synthetic life-forms and the humans could mean the end of all life. But there is one, named Typhon, who may be able to prevent that.

Being a hitman for the government is never easy. And then the girl you like turns out to be...!

Hikaru Nakamura author of "Saint Young Men" and "Arakawa Under the Bridge" begins a new series for the first time in 10 years! The Black Santa Claus is looking for staff for his "Black Enterprise"!!

Himemiya Shin has always wanted to become an actor ever since he was in high school. Now, he is an up and coming actor who only gets roles for the bad guys. Tatebayashi Kazushige has always wanted to go to college, but instead he became an actor. Now, he is an up and coming ikemen who only gets the likable roles. These two opposites may look like they have nothing in common on the outside, however, what secrets lay on the inside? Follow these two as their mysterious show business secret love unfolds.

A collection of stories:

1. Black Outsider
Amano bumps into his crush Takase for the first time since high school almost 20 years ago. They go out for a drink but, a lovers spat knocks out Amano. When he wakes up he finds himself in high school again!

1.5. BurnOut
Black Outsider extra

2-5. Dorobou to Hatsukoi (A Thief and First Love)
Tachibana Yutaka has a face-to-face encounter with his guilty past when he runs into his high school crush Momoi. But Momoi has a secret too, and has no intention of letting Tachibana run away.

6. Dorobou to Destroyer

6.5. Dorobou to Hatsukoi Extras

From Titania:

A manga about people trying to kill themselves, but weird stuff happens instead.

01 - Group Suicide
02 - Strange Tale of the Pylorus
03 - Paradoxical Night
04 - Dr. Suka's Villa
05 - The Spirit World Project
06 - To The Dazzling Future
07 - The Licking Woman + Mystery Pavillion (Ones-shots)

From Delish Scans:

"I'll be your captive."
Love potions DO exist.

Kisaragi Akira is a police officer investigating a murder case that reminds him of his past.
The memory that he forced himself to forget.
And the past that he buried in the deepest part of his heart.
The clock that was once stopped has started ticking again.

The story follows a girl in the "Threshold" (??, Hazama), a world beween Heaven and Earth. "Impure souls" — those that could not ascend to Heaven with the burden of their own weight — have drifted to this world of constant warfare. Based on a music video with the same name "Black?Rock Shooter". Sung by Hatsune Miku