Enslaved Ninja are forced to compete in the Arena and fight until death!The victor is given the chance to progress until they defeat the current champion. If they succeed, the winner will be rewarded greatly and granted freedom.

From Tokyopop: The One Year War between the Earth Federation and the Principality of Zeon has begun--and the newest Mobile Suits are tested for battle! Captain Matt Healy leads his team into dangerous territory as the leader of a Special Forces Experimental Unit. Ken Bederstadt is a Foreign Legion Lieutenant working in alliance with Zeon. These two heroes are trying to keep everyone alive...for tomorrow! There are 2 editions of this manga, the 2003 edition (same as Tokyopop version) and 2005 "complete" edition with 2 additional chapters - a prequel and a conclusion to the storyline

This world is full of weird things. Each of them is a knot. And I am the one who will untie all of them, until I found the "key"- the key can save me from this world.Note: Read left to right

From: BAP Scans He is a clone. He is a clone that wants to kill. When he awoke, the only words he remembers are, "If you meet the Buddha, kill the Buddha, If you meet the God, kill the God." His "older body" was killed mysteriously. Rumor says that his "older self" was tortured and killed by a group called "Alethia". Now, Alethia are hunting him. And he must stop them, stop this terrorist organization before they destroy the whole world.

Ilegenes is an island internationally known for its prowess in genetic engineering research and technology. But behind the scenes, it is a breeding ground for illegal clones, which are sold for major profits in the black market. After witnessing the death of his parents, young Fon F Littenber joins the Ilegenes Military Academy to rid the island of both its connection to the black market and its tainted name: The Genetic Sodom.

Josh is a 15 years old Bully who have been expelled from his highschool for hitting a student who threatened another student. Thereby he was thrown out of the house by his mom. Now he's trying to get into a federal agency named The SCB.

In a post-apocalyptic world, a girl leaves her village to find her missing childhood friend, and save her dying world. Her companion in her quest is a machine named "Edison Stein," and he can draw blueprints for magnificent machines. What will await them in "The world outside"?

It's the year 2034 and high school student Sasaki Hiiro boards his bus just like any other day. Everything changes, though, when his bus is suddenly attacked by a mysterious girl with red eyes. When Hiiro awakes, he finds himself in "Tokyo," a city which was supposed to have been permanently sealed off after the outbreak of the deadly Pandora Virus ten years ago. Not only that, but it also seems like all those being gathered in "Tokyo" are developing new inhuman abilities. Now, among the ruins of Shibuya, Hiiro and his friends must discover why they are here and learn all they can about the terrible Malicious Code that is running wild in their bodies before it destroys them all!

On an alternate Earth in the not too distant future, a monster is found by 2 kids, and shortly after a 3rd friend joins the group. It's a story about the monsters journey through life as he tries to find out who and what he is...and about his true destiny. https://www.facebook.com/grumblemanga?ref=hl

Updating

Since the conclusion of the original series, Rin and Arisu are leading happy lives. Their son, Ren, is a very normal boy. But one day, a man and a woman as beautiful as an angel appear in front of him and tell him about a power! What is this power Ren suddenly has? The much anticipated sequel to "Please Save My Earth"!

From Anime News Network: The story begins in the distant future in the far reaches of the galaxy. The Human Galactic Alliance has been constantly fighting for its survival against a grotesque race of beings called "Hidiaazu." During an intense battle, the young lieutenant Redo and his humanoid mobile weapon Chamber are swallowed up into a distortion of time and space. Waking from his artificially induced hibernation, Redo realizes that he has arrived on Earth, the planet on the lost frontier. On this planet that was completely flooded by the seas, people live in fleets of giant ships, salvaging relics from the seas' depths in order to survive. Redo arrives on one of the fleets called Gargantia. With no knowledge of the planet's history or culture, he is forced to live alongside Amy, a 15-year-old girl who serves as a messenger aboard the Gargantia fleet. To Redo, who has lived a life where he knows nothing but fighting, these days of peace continue to surprise him.

Gisele is a happy-go-lucky princess of an empire covered in snow, renowned for its production of androids. To make her smile more often and avoid all the boring princess responsibilities, Nero builds an android identical to her to act as her double. But when her power-hungry and warmongering father decides to marry her off to a prince of another warring country and use her android double as leverage, what will happen to these two and their country?!

A man is on a research expedition in an underwater city, where he discovers a holographic recording of a ballerina.

A tale about people who have to shoulder the burden of mankind’s progress

A young girl is mistaken for an alien princess and kidnapped... however there is more to her then meets the eye.

A huge anomaly ravaged the mainland in Japan and ruined most of Tokyo, sinking three quarters of town to the ocean. Ten years after, the narrative shifts to Ganta Igarashi, a seemingly average pupil attending the middle-school of Nagano Prefecture. As an escapee, a survivor of the quake that is fantastic, Ganta has lived a regular life and has no memories of the disaster. This all changes when a strange man covered in ruby armour and blood floats through his class-room windows. Grinning madly, the 'Red Man' massacres the whole class of Ganta but but rather of killing him, embeds a reddish crystal shard in the torso of Ganta. Within days of the massacre, Ganta is sentenced to death at Deadman Wonderland, a jail that doubles as a theme-park and is subjected to some kangaroo courtroom as a defendant. Arriving in the jail, Ganta is fitted using a unique apprehension which tracks important indicators and his place. A deadly toxin is continually injected in to his blood-stream through the grab, but nevertheless, it may be neutralized by have a particular sweet-like medication every three times, which is often had through various actions in the jail, i.e. performing for crowds, operating back-stage, buying with forged factors (a type of money among prisoners at Deadman Wonderland), etc. To assemble Cast Points, an offender must execute in the deadly games of the facility and live. Luckily for Ganta, a mysterious woman named Shiro, who seemingly understands Ganta, and is understood by other prisoners at the same time aids him. While wanting to live as an offender on death-row, Ganta means to locate the 'Red Man' to clear his title. In a weird turn, Ganta starts to acquire the capacity to control his blood, of making it a weapon to the idea. Unknown to Ganta, he's become one of the jail's "Deadmen," an isolated number of prisoners have the Branches of Sin making them capable of controlling their blood. Ganta is made to take part in cruel gladiatorial death matches called Carnival Corpse, whose anonymous viewers pay substantial amounts of cash to observe after his skill is found. In his lengthy battle to live he manages to befriend a few of those he fought off in the stadium and with their aid, Ganta proceeds his search to to discover the identification of the 'Red Man', why he changed into right into a Deadman, as well as the shadowy secrets the penitentiary authorities are concealing

It turns out that our world is just like an RPG! We're all just NPCs, so stop acting like you're the protagonist!

Hitomi is a pokemon ranger; someone who uses wild pokemon to achieve their goals rather than capturing them. While pokemon rangers don't need balls to capture pokemon, they do use a tool called a slider in order to get closer to the wild pokemon. 2 years after her graduation from the ranger academy, she joins a team with a top ranger. This ranger uses a rare type of slider called a Batonnage slider, which is only available to top rangers. Just what kind of skills does this top ranger have, and more importantly, how exactly does the Batonnage slide work?

Chinami was born with psychic powers. She has always wanted to join the Psycho Police Force. However, she doesn't know how to control her powers, so she failed the entry exam. However, after being saved from a psychic criminal, she joins the Psycho Merchants instead.

Rocket Princess was written by Nobuyuki Anzai before he started his work on Flame of Recca. Basically, we follow Ishibashi Kango through his days as he interacts with a cyborg by the name of Oozora Kohime. If you liked Flame of Recca, then I'm pretty sure you'll find something to like in this one, too.

Yokami Futsu, or Fu-chan as he is commonly known, was brought up by his grandfather after his father died. But now his grandfather had also died – leaving behind a large amount of debt. At the funeral, his grandfather’s cousin (who looks uncannily like grandpa himself!) suddenly appears and declares that he wants to take care of him. Together, they start living in a dilapidated, run down house and Fu-chan is forbidden from entering some of the other parts of the house. One night, he encounters a mysterious handsome man at the house and instantly gets the feeling that he had seen him before – even though the man outright denies it himself when asked. Add into that his cousin’s odd and ridiculous behaviour that strongly reminds Fu of his carefree grandfather, and the wild rumours flying around, Fu becomes very suspicious. Also what are all those dreams that he had having for long time now, dreams that seem like it had really happened to him rather than just some outright, random dreams…? And who really is that man that Fu had encountered that night and why does he get such strong feelings when he is around him?

22 years ago a mysterious seismic phenomenon rocked the Yokohama district, thrusting it miles into the sky and effectively separating it from the rest of Japan. In the following years, a fraction of the newborns in this fledgling world began to develop extraordinary powers, each unique to the personality of the possessor. These mutated humans became known as Alters and were responsible for turning the former Yokohama into a chaotic wasteland. Now, as the former metropolis continues to re-build itself, the Alters have fallen into two camps: those who have joined HOLY, a dogmatic organization that hopes to re-establish order and morality, and those who wish to lord over the comparatively weaker humans. Only Kazuma, a powerful Alter who's really only interested in looking out for himself and an orphan girl named Kanami, stands between them, suspicious of both sides and unaware that he may hold the key to harmonious co-existence.

From Tokyopop: On a world with no women, the surviving men have reintroduced the female in the form of an android. Called Marionettes, they are built to serve men and are limited in their interactions with humans. That is until a poor boy named Otaru Mamiya encounters a Marionette named Lime. Lime is a Saber model with a special circuit that gives her emotions. When Otaru awakens two more Saber Marionettes, his life as an 'average' man quickly becomes as extraordinary as the lives of his eager, busty new friends.