During summer vacation a group of fifteen children discover a mysterious man living in a cave surrounded by high tech gadgets, the man claims to be a game developer, creating a video game with a giant robot defending Earth from fifteen alien invaders. He asked the children to test the game for him and they agreed.

After her grandfather's death, Mikura chose to continue their island express courier service. With her seaplane and her adventurous cat, Endeavor, she lives life as she chooses. Soon, Mikura becomes very interested in a mysterious island that seems to move around, according to local legend. After some extensive effort to determine the island's whereabouts, she manages to get a brief glimpse of it from the sky. Now that she knows it's real, she's determined to find the island again, no matter what it takes!

From Storm in Heaven:

Matsumiya Kana lost everything when her father was arrested and charged with embezzling funds from the Japanese Ministry of Defense. However, she soon learns that her father actually worked for a secret organization within the Department of Internal Affairs, and was in charge of embezzling money to support it off the books. He was being used by an "embezzlement group" within the secret organization, and that group is willing to kill to keep their activities quiet. The life of his daughter, Kana, is the perfect blackmail to ensure his silence. Within a corrupt agency, where anyone could be a traitor, will Kana be able to avoid falling into the hands of those plotting against her...?

Two years ago, Shibuya was ravaged by a biological terrorist attack using the deadly Ua virus. Maria Osawa was saved when her father inoculated her against the virus, but is left with partial amnesia from the shock. Now working as a cameraman, she reunited with her friend Canaan in Hong Kong. Canaan is an assassin gifted with synesthesia, and she's being targeted by the terrorist squad Snake. Meanwhile, numerous groups converge on Hong Kong, all after either Canaan or Maria.

Two twin brothers Ry and Key were trained in martial arts since childhood by their Martial Arts father, "Rokuu Riley" as they are now young adults a tournament begins in their city and they feel they are called to accomplish something much greater in life. And in their own ways they will not stop until they have succeeded no matter what challenges, threats or obstacles come into their lives.

From Fallen Syndicate:

Seri, a somewhat directionally challenged girl, went to Umeda for a job interview. Finding herself completely lost, she stumbles across a slightly opened door and decides to try her luck.

She takes the stairs behind the door, emerging on a peculiar street half an hour later. Unknown to Seri, she has just mistakenly entered a place far more dangerous than she could ever imagine.

From DrMaster:
Supernatural phenomena and strange occurrences are no sweat for the Nanami Paranormal Investigation agency, headed by Asagi Nanami. As "freak" activity grows to a terrifying fever pitch, Asagi's assistants -- Naoki, Tokiko, and Mahime -- help to solve several major "freak" cases. Freaks are creatures with the ability to possess humans and prey on their weaknesses. However, Asagi and his gang are no ordinary humans; each is equipped with a special power to vanquish Freaks.

A gripping reinterpretation/adaptation of The Illiad by Homer that revolves around Priam's daughter, Cassandra, who was believed to have been given the gift of prophecy by Apollo when he proposed to her.

Charisma is a multi-perspective story following several different characters. The central character is Archer, whose childhood was rather messed up due to the influence of his mentally unstable family members. His father Ed is afflicted with bipolar disorder, while older half-brother Murphy is autistic.

The story follows Archer as he works with Deano to infiltrate a drug cartel that has a long-standing enmity with his gang. Along the way he meets Ken, who's also infiltrating the cartel (for the police). What follows is a multitude of conflicts between different gangs, members of the same gang, and seemingly random people.

The chapters in the first volume are not in chronological order; the story begins with Archer being released from prison, then goes back to the past and how everything began.

NOTE: Cover image is from volume 3 of the 2001 edition.

Takumi is a high school student. He is withdrawn and is not interested in 3D things. In his town, a mysterious serial murder case happens and people get panicked. One day, when he chats on the internet, a man suddenly contacts him and gives him an URL. He goes to the website and finds a blog image that suggests a next murder case... On the next day, it really happens... Takumi Nishijo suffers from intense delusions as a result of his apparent schizophrenia and the extremely secluded lifestyle he lives as a hikkikomori. One day he accidentally stumbles upon a gruesome murder scene, a part of a chain of events called "New Generation." After this, his life gets caught up in these events, and he meets a bunch of increasingly insane anime girls with swords.

Chaos;Head's story is set in 2008 in Shibuya and is centered around Takumi Nishij?, a high school student at the private Suimei Academy, and the strange and brutal murders that have recently occurred in the Shibuya area, known as the "New Generation" (????????????) Madness. The story begins on September 28 with Takumi talking to an online friend called Grim (??? Gurimu?). Grim is trying to bring Takumi up to speed about the recent New Generation events since Takumi is not interested in local or international news. A person named Shogun (???) joins the chat room midway through Grim and Takumi's conversation. After Grim leaves the chat room, Sh?gun begins to talk. He speaks in a very cryptic and confusing manner, leaving Takumi nervous. He then sends Takumi a barrage of image links, one of which appears to be of a brutal murder of a man being pinned by stakes to a wall. The next day, Takumi comes across a real life murder scene. Witnessing a mysterious pink-haired girl pinning a man up by stakes in an alleyway, he immediately realizes he is witnessing the very murder detailed in the pictures he received the day before. Convinced Shogun is targeting him and the girl he saw committing the murder is somehow connected to him, Takumi tries to avoid getting involved with other New Generation events. However, as Takumi begins attempting to distance himself from the crime he witnessed, he soon catches interest of the police. With the police suspecting him, and himself convinced that he is being targeted by Shogun, Takumi finds himself caught in a spiral of delusions and paranoia, as he desperately tries to keep himself safe and figure out why he is apparently being targeted. He eventually comes into contact with several other people related to the events, including the girl he saw committing the murder herself. Unsure of what is real or who he can trust, Takumi finds himself thrust into a much larger scheme than he ever thought possible, as the mysterious company NOZOMI carefully plots something from behind the scenes. From Baka-Updates: Takumi is a high school student. He is withdrawn and is not interested in 3D things. In his town, a mysterious serial murder case happens and people get panicked. One day, when he chats on the internet, a man suddenly contacts him and gives him an URL. He goes to the website and finds a blog image that suggests a next murder case... On the next day, it really happens... Could he be really the one responsible? And where is the D-sword that he is supposed to find?

Jail: Risk Hunter number one! He can alter his appearance using "Kara" and uses it wisely to kick his enemies' ass.

----------------

"Risk hunters" are professionals who handle jobs considered too tough for normal law enforcement, such as kidnappings, combating terrorism, and preventing murders. One man who stands above them all however is the legendary Chameleon Jail, who has the ability to manipulate his "kara" or internal human body energy in order to physically change his appearance into that of any other person.

Throughout the series, he pursues several assignments on behalf of various clients given to him by Shall, a woman who runs a detective agency in New York City. All difficult, the successful completion of these assignments hinges on Jail's ability to change his appearance when the time is right.

From CMX:

Schoolgirl Makishima Misaki's life is about to get a lot more complicated! She has inherited the house that belonged to her maternal grandfather, in a small, quiet, snowy town that boasts its own local legend, the Hohopo.

Moving into the house with her klutzy widower father, she soon makes new friends — including one very unusual friend: the Hohopo itself, a shape-shifting creature who looks like a small Loch Ness Monster...when he's not masquerading as the boy next door!

A four-part manga series depicting the events previous to the American movie Cloverfield (more info in the link). In the manga (more info in the link), a connection is implied between the human protagonist Kishin, his mother, and the creature.

In a world where monsters called Yoma prey on humans and live among them in disguise, humanity's only hope is a new breed of warrior known as Claymores. Half human, half monster, these silver-eyed slayers possess supernatural strength, but are condemned to fight their savage impulses or lose their humanity completely.

Mari, like another Japanese girl, has been invited as a formal guest. She is to be headed to another country to visit her friend who became a queen. When Mari arrives there, things starts to get mysterious as there is an attempt to kill the royal family. Who is behind the plot to kill them?

The mighty Kingdom of Goguryeo is in the midst of a war which has raged on for decades. In need of talented warriors to help lead their people, O'Rhang Yhun is sent on a mission by his master into enemy territory to find and bring back his eldest brother. However, just as O'Rhang departs on his mission, his master, a renown warrior and general of Goguryeo, passes away. Unfortunately for O'Rhang, his 2nd eldest brother has always been jealous of his martial arts potential and betrays O'Rhang by branding him as a traitor defecting to the enemy. Having been branded a traitor, he is pursued and nearly killed. As fate would have it though, O'Rhang is able to escape from his homeland barely managing to survive when a maiden as beautiful and graceful as an angel saves his life. Join O'Rhang Yhun in this action packed adventure-love story to uncover the secret behind the martial arts his master passed onto him (Sa Shin Mu), his quest to find his oldest brother, and the score he has to settle with his 2nd eldest brother! [The Continuation of this manhwa is the manhwa NOW.]

Combination is a police story about two very different men becoming partners to fight crimes in high places. Their combination turns out to be one-of-a-kind.

The story is based on the adventures of a pair of policemen, Hashiba Shigemi 26 years old and Keiichi Sasaki, 22. The two handsome young men are somewhat nonconformist and often act of impulse; especially the impetious Hashiba. They solve crimes with "less-than-orthodox" methods and push themselves to the limits of the legality; Often engaging themselves more on hunches and "faith" than for the same law; but after all they are the best "Combination" that can be found. thus the title of the series. They prefere to take action against the politically corrupt and the dealings of the yakuza. The Japanese Robin Hood?

A beautiful love story between a boy and a girl, that takes place in Hokkaido.

From Storm in Heaven:

Ten years ago, there was an explosion at Hisano's apartment building. She would have been there, but she'd been hit by a bike ridden by a boy in blood-stained clothes. He dropped a fake gem when it happened, and she's been hanging on to it as a good-luck charm ever since. Now Hisano's in high school. One of her teachers was murdered, and the police are investigating. A young man suddenly appears carrying the toy the gem belonged to. And perhaps... can he also see the hallucinations Hisano has always been plagued with? Everything is connected as the pattern slowly rises to the surface.