In this story, Nagai gets his folklore on with every chapter containing a lot on Buddhist lore or Japanese folklore. The prologue introduces us to Heaven, Incorporated, a company with a particular staff that hunts down all sorts of supernatural monsters and protects humanity from them.
(Source: MU)

The story tells about Hiroshi Shiba, a car racer who is mortally wounded on a laboratory accident, but restored to life by his father, Professor Shiba, a talented scientist/archeologist, who is incidentally investigating the relics of the ancient Yamatai Kingdom. The professor discovers a tiny bronze bell with sorcerous powers, and shortly afterwards he is murdered by the henchmen of Queen Himika, the ruler of the Yamatai (sometimes translated as Jamatai) Kingdom, who wants to seize the ancient bell and its power.

A young woman makes a pact with her 'fairy godmother' Yaaba to become the mighty Cinderella Knight, a beautiful warrior, to protect her beloved Prince Emilio of the country Ballade from an evil conspiracy led by a mysterious group known as "Murder" and their elite assassin corps, The Spiders.
(Source: HappyScans)

Mazinger Otome depicts the mechas of the Mazinger franchise and Steel Jeeg series as androids where they fit into regular life. It follows the android girls that make up the cast as they deal with life in high school and from the school delinquents the Mechanical Beast Army. The main protagonist is Seto Magami, an android based on the Mazinger Z who is treated as the granddaughter of Juzo Magami. Later with the introduction of the New Mazinger Army, there are heated arguments and fights between them and the originals.

(Source: Mazinger Wikia)

This brief resurrection of Go Nagai's Violence Jack character appeared in 8 chapters in the magazine Comic Bunch in 2005 and has never been collected in a single volume. OK, resurrection may be the wrong word since Jack didn't actually die when Nagai ended the original series in 1990 and he also didn't bite it in the 2001 stand-alone short story DEMONS IN A WAR-TORN land. But you get the idea.
(Source: deadfrog)

After the world ended in the original Devilman, Akira Fudo is in hell, seeking the soul of his beloved Miki while at the same time Doctor Hell is beseeching the underworld for power in order to get his revenge upon the hated Mazinger. Akira sets in motion a chain of events that earn the enmity of Hades himself, who'll stop at nothing to avenge the slights Akira commits against him...

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An autobiographical manga about the career of Nagai Go and how his most known works were born.
How a young Nagai Go, struggling to break out of his typecasting as the go-to guy for gag manga by breaking into the sophisticated world of story manga.

It is 199X A.D. In Kushiro, Hokkaido, three bodies of Dragonite appear. Possessing overwhelming destructive force, they attack the city. They also awaken the evil Jashin Drago from the holy seal he was trapped in. 200 years ago, Drago was trapped in the seal by a holy warrior with the tattooed mark of the Liger. Assuming that the warrior is dead, Drago and Empress Zara are free to conquer the Earth using their army of biomechanical beasts. Even the Japan Self-Defense Forces are no match for the Dragonites' awesome power. One of the people fleeing is the protagonist, a milquetoast 16 year old boy named Ken Taiga. Unbeknownst to the Dragonites, Ken realizes that he is the descendant of the Liger warrior. In a burst of anger, Ken's Liger birthmark appears, and he rises his palm into the air, shouting the henshin command, "LIGER!" which then covers him in demonic, long-haired biomechanical armor. Ken transforms into Jushin Liger to fight the evil forces of the Dragonite!
(Source: Wikipedia)

A Violence Jack one-shot from 2001. What happens when Jack and some bikers mysteriously get sent back into the age of samurai.

Spring, 1991. Mysterious gold metal balls fall from space... The balls were too small to be sensed by humans, so they were scattered across the entire earth without incident!

Included one-shot:
Zipang

Continuation of the successful manga and anime series Mazinger Z, Great Mazinger starts after the defeat of Mazinger Z. Tetsuya Tsurugi is the new protagonist, piloting the powerful Great Mazinger, a creation of the once thought dead Kenzo Kabuto, the father of Koji Kabuto. This time the enemy is the Mycene Empire and its powerful robots. (manga updates)

Lovely Angel is about a beautiful woman known for her kindness, charm and ability to touch the lives of others....through some unconventional means.

(Source: MU)

One of the first Super Robot manga and the one that introduced most of the traits of the Mecha genre. Constructed with the Super-Alloy Z, Mazinger was built by Professor Juzo Kabuto as a weapon against the Mechanical Beasts of the evil Dr. Hell. Koji Kabuto, the grandson of Professor Kabuto, becomes the pilot of Mazinger Z when his grandfather is killed, and battles from there on against Dr. Hell and his allies. This is the first series that introduced the concept of a pilot inside a Mecha, which all series from then on have followed.

Great Mazinger (Sequel)
Mazinger Angel (Alternate Story)
Shin Mazinger Zero (Alternate Story)
UFO Robo Grendizer (Sequel)
Z Mazinger (Alternate Story)

In the prehistoric times when men were reptiles and the world was over-run with dinosaurs, humanity was threatened with war. The humans are fighting against the almighty Gor to return peace to their world.

Slight retelling of the 2001-2002 Mazinkaiser OVA series.

In 2071, north pole ice have melted and the land has been submerged. Humanity survived but it's divided into two species: the true humans, those who live in underwater cities, and the Dugons, those who chose to undergo genetic modification to live in the sea. Both species go to war to survive as long as the Dugons consider the humans good to eat.

To defend against the Dugons, the city of Mari Ramelle builds a new kind of weapon, the mermaid robot, Salacia. Because of the small size of the the pilot cabin, the robot is piloted by a girl and a boy, both 13 years old: Marin Yuuki and Ushio Mizushiro. The fight for survival is hard, and during the manga, the city builds more mermaid robots.

(Source: MU)

Fudo Jun is a school teacher having dreams of uncontrollable urges of violence. She takes the school tennis team on a trip where they are attacked by demons. To try and save the girls and herself she ends up unleashing Devilman Lady.