From ADV:

While trying to bury the body of his mother deep in the woods, high school student Yuri is approached by a strange girl who offers to help him. That is... if he promises to be her "parent killing assistant." Meet Anne Freaks, a bright, attractive teenage girl normal in every way - except that she's on a mission to kill her father, the leader of the dangerous extremist cult: the Kakusei Group.

From: Easy Going Scans

A rumor goes around school about an abandoned amusement park and a magician who lives there that can make someone disappear for good. Yoon Ah-ee, a girl struggling to feed her sister and herself everyday will experience her life change as she meets a mysterious magician.

For years the rash tomboyish Tsubasa had communicated with her twin through letters. She had formed the idea that the gentle Arisa led a joyful school life. But upon Arisa's sudden suicide attempt, Tsubasa vows to find the reason behind her twin's actions by taking her place at school. But will this supposed joyful life be too much for Tsubasa to handle? What does it have to do with the people disappearing from Arisa's school...

(From Prisms):

A depressing story about how a Japanese family's life goes wrong: an immoral protagonist, her sister who was gang raped before, her alcoholic mother who later devoted her life to a cult, and her father who lost favor with his company... full of sexual content and highly violent.

A witch named Baba-yaga lives deep in the forest. If you’re a good kid, she might save you on a whim. If you’re a bad kid, she’ll devour you.

It started with a brutal beating at a pachinko parlor, and now Bakune Young -- maniac, moron or mastermind -- has taken Japan's biggest crime boss as a hostage as Step One of his plan to rule the world! Soon, yakuza, police, hapless detectives and Bakune's former gym teacher collide as Bakune holes up with his hostage in Osaka Castle, and the manly men of the Japanese mob vow to do anything to rescue their boss!

Can Russian-roulette-playing police chief Sorigami salvage the situation with his highly trained army of human robots? Will Johnson Membodeath, the ninja, stop the madness by killing everyone in sight? Savage satire of the action-violence manga genre!

Like the earlier Battle Royales, a class of middle school students are picked to compete in fights to the death on an island until there is only one left.
The manga follows the point of view of Girl #10 Makoto Hashimoto, an unlucky girl who fears that her class will be chosen to participate in "the program," a mysterious event that forces students to kill each other. Makoto attends Shikanotoride Junior High School. After the encouragement of her best friend Itou Yamamoto and her mother she decides to face the chances. Her fears are supposedly put to rest when word spreads that all 50 Programs had already been executed in the year making them 100% unlikely to participate....

A collection of stories portraying the cruel and twisted nature of love, lust and desire -- and the misery it brings to all those involved.

This is volume 1 of Hanlu's Portfolio of Stories.

Volume 2: 瞳深水 (Eyeball Deep Swag)

Four people who used to attend the same high-school together are suddenly knocked unconscious and kidnapped. When they regain their senses, they find themselves trapped within a container box. A mysterious voice then commands them to "Repent your past sins if you wish to escape with your lives"...

A compilation of short stories:

• Bannin (The Guardian)
Kazuhiko Saibara finds himself dead in the woods surrounding his family's summer villa. As the family servant digs his grave, Saihara's feeble-minded younger brother gazes absently upon the scene, and Saihara himself begins to recount the events that led to his demise.
- PresenceDear

• Show Me Heaven
A smile of a skinny angel opens up a closed-minded man's heart.
- Countless Time

• Sora no Uragawa (The Other Side of the Sky)
Yousuke, Tamotsu and Satoshi are high school buddies until tragedy breaks them apart. Ten years later the death of one of them brings the remaining two friends back together and past wounds are torn open.
- Aarinfantasy

• Meguriai Cosmo (A Chance Encounter in the Cosmos)
Klaus is the hideous commander of a starship with a hideous crew. One day, his crew capture a gorgeous young man, who reminds the captain of someone from long, long ago. Repulsed by his appearance, the prisoner does his best to make things difficult for Klaus, but Klaus's warm and kind heart does him in...
- Bushido Angel Adventures

From Viz:
Nature made Ash Lynx beautiful; nurture made him a cold ruthless killer. A runaway brought up as the adopted heir and sex toy of "Papa" Dino Golzine, Ash, now at the rebellious age of seventeen, forsakes the kingdom held out by the devil who raised him. But the hideous secret that drove Ash's older brother mad in Vietnam has suddenly fallen into Papa's insatiably ambitious hands--and it's exactly the wrong time for Eiji Okamura, a pure-hearted young photographer from Japan, to make Ash Lynx's acquaintance...

Three members of a modern-day Japanese cult who are taking part in a "deserted island" program in which they must work together to purify and refine their spiritual essence and transform themselves into more advanced human beings. Of course, life doesn't usually work that way.

War looms over everyday life in the capital. Two girls who seek respite in the bucolic outskirts of Suginami Ward learn that a riverside where spirits reside is creeping with rotting anomalies. As the adults prove incapable, youth must take up arms.

Suwa Daisuke is an ordinary, but popular, high school student. One of his classmates, Aikawa Hinako, is somewhat fearful of men and because she ran away from just his attempt to touch her hair, he states to one of his buddies, that she is the only one he wouldn't date, unaware all of the people in his classroom could hear them, including Hinako.
Daisuke's attitude changes after he unintentionally hears a shocking truth that she confesses in an abandoned church. His former annoyance turns to compassion and concern. Hinako is unaware that he knows her 'little' secret. Believing him to have no romantic interest, she becomes more relaxed and comfortable in his company. Their relationship faces a lot of obstacles, including jealous classmates.

There's Vinny, the gang leader, and his best friend and sidekick Sean. Skip and Dick are, respectively, the errand boys and the muscle of the gang. And there's Vinny's younger brother Kyle, whom Vinny raised from a baby after his stepfather took off and his mother died of drug addiction. Vinny also has a neat girlfriend, Sandy. Vinny is rabidly homophobic (besides having a hate-on for almost everyone else- doctors, police, social workers, the usual.) Kyle is gay and getting it on with Sean. Trouble is just around the corner. Trouble happens, but with a long fuse. Things aren't over when Vinny finds that Sean's been screwing his baby brother and beats him to a pulp.

Killy is a man of few words. He wanders, seemingly endlessly, through a lonely, gargantuan labyrinth of concrete and steel, fighting off cyborgs and other futuristic nightmares, searching only for something called Net Terminal Genes. And he has a very powerful gun, which he uses without hesitation whenever anything resembling danger rears its ugly head.
Who is this quiet, violent, determined man and what are these Genes he seeks? The small communities he finds tucked into the crevices of this towering, dystopic ruin hardly give him leads on his treasure, driving him to find larger enclaves of civilization where people can reveal more about the world he lives in and the quarry he seeks.

The world’s largest luxury ship 'Blue Heaven' saves a wrecked ship out at sea. At the captain’s command, the ship is searched, and 2 male survivors are rescued. On the ship, there are signs of horrible bloodshed. One of the rescued men, of unknown nationality, loses himself among the ship’s passengers and starts randomly slaughtering the patrons and staff. What is his motive?!

Two years after the end of Bloody Monday, a new threat emerges intent on destroying Japan. But what will happen now that "Falcon" has since disappeared? Who will face the deadly "Shooter of the Magic Bullet?" Tune in to Bloody Monday Second Season and find out!

It has been a year since Fujimaru Takagi disappeared and now he has appeared once again, as a terrorist.

A virus deal clinched in Russia on the Christmas eve. Purpose: unknown. Two clues: a mysterious lady "Maya," who is one of the gangsters, and "Bloody Monday," the keyword for the project.

Then an incident happened in far-distant city of Tokyo. Fujimaru Takagi, a second year student at Mishiro Gakuin high school, is commissioned to find out the truth by the Public Security Intelligence Agency, for his great ability as a super hacker. Now, Maya approaches Fujimaru as his high school teacher...