From MangaHelpers:

Unknown entities known as "Witches" roam the cities. They exist solely to destroy humans and turn them into one of the Witches. There is a sector in the government known as the Suppression Corps that specializes in dealing with these Witches, who are completely immune to conventional weaponry. Hansel Takamine is the leader of this group, and has an extreme hatred towards the Witches. With his sword imbued with the powers to eradicate Witches, he fights to avenge his sister who was murdered by these monsters. [DrCoke]

In a not too distant future, the world is confronted with a host of issues: pollution, resource depletion, population expansion, and so on. In response, the Japanese government developed sensory simulation capsules (“beds”) and successfully launched a virtual reality program — “Gaia.” Interestingly, the designers omitted the concept of pain from the program, and as a result, there are no such things as pain or death in this new virtual world.

On a day that started as any other, Oono Yuuri stumbles across a mysterious card, which sets off a chain of strange events that evolve into a tale of conflicting dreams, unlikely friendships, and reluctant vengeance.

N/A

Cutie Honey for the 21st Century.
Seiko Hayami a private detective and her partner Hisashi Hanyu, are tasked with solving the cases that the police can’t handle. What they soon uncover is a seedy underbelly of crime perpetrated by an organization that can turn humans into monsters.
With Seiko being overwhelmed by these outrageous cases will a hero arise to help in her stead?
A warrior of love only heard from stories long ago.

Many years ago, an ancient civilization once ruled Earth. They were known for advanced artifacts and machines, but were destroyed in the end due to the misuse of their creations. Creating indestructible message plates written in Hebrew, these people left messages for later generations, informing them that if they could not find a good use for their creations, they should be destroyed.

Various entities such as paramilitaries, national armies and armed private forces began to secretly search for these "mysterious" artifacts in order to be used for their own good and against their enemies after the end of the Cold War. Only the ARCAM Corporation can stop these forces from destroying themselves with these "advanced" machines. With the help of its military arm, the ARCAM Private Army and their elite secret agents known as Spriggans (or Strikers), ARCAM plans to turn the tides of battle against those who would threaten the safety of humanity by using the dangerous artifacts.

Manipulating a demon with a worm-eaten body, the girl exterminates all sinners!! Accepting requests from the families of victims killed unreasonably, boys and girls are set on continuing to kill the sinners. They are responsible for this business without knowing when it will end, but also unable to live a different life, today also they open the curtain of revenge

An audiophile jumps to his death, meets something on the way down... and ends up crawling away from a pool of his own blood.
An unmotivated music high school student (our main protagonist) vs. a speeding truck meets the same fate in front of his friends.
Now those two must kill each other "in order to understand the joy of living", as proxy, with the power of classical music incarnated.

From AnimeWaves:
Touko's life seemed so ordinary, until she got that call... At the scene of the accident, by the puddle of blood, a young maid appeared... could no one else see her? And then, around the corner, a cry for help from a silver-haired boy... The veils are being lifted and the truth is being revealed!

From Japanzai:

In the edges of this world, demons known as "Pagans" lurk. Pagans are born when the souls of the recently deceased fall off the path to reincarnation. The reincarnation ceremony must be performed under moonlight, and so cannot be performed inside a city like Faith-Dehli, overly shrouded by both constant mist and thick smoke.

The Twanbach Funeral Service Company specializes in hunting these Pagans, especially those that attack while Twanbach delivers recently deceased bodies to the reincarnation ceremony—because there's nothing Pagans desire more than freshly dead human bodies with the souls still slightly attached.

Reginald, a 100+-year-old vampire who looks like he's 20, gets scouted by the Twanbach Company owner's mysterious twin daughters, Vanessa and Veroinica Twanbach. But first, they'll hunt Reginald a little, to see how far off the path he's fallen...

From MangaHelpers:
One day, Son happened across a woman, named Shue, that he had loved as an older sister when they were young. It looked like it was the same woman, with the same scars, but Son had thought she was dead. In fact, she was a reanimated corpse, resurrected by a young girl named Fuu to work as her minion. Son becomes Fuu's follower, determined to find a way to return Shue's soul to her body so that she might live again. However, Son doesn't know what he's gotten into with Fuu, though, as she ends up in conflict with many other practitioners of her arts, using Shue's reanimated corpse to do things that Son would rather have never seen.

Hika Souma, called Picasso by friends, is 17 and still without a girlfriend after being dumped 13 times. One day, a pretty girl who later introduces herself as Sujata drags him out from a moving train, and with her unwanted assistance, his childhood trauma toward demons (oni) takes the form of a real demon summoned out from his body.

This is oneshot of Tokyo Ghoul.

Japan is being invaded by parasitic gods. The only one left to stop them is Nakua, the spider god. She enlists the help of Taromaru, an otherwise normal boy who has the Nakua's spider familiar resting inside him. Together they free Japan's gods from the control of the parasites.

A short crossover between two manga from Ura Sunday - Mob Psycho 100 and Sekai Oni - drawn by the mangaka of Sekai Oni.

The manga consists of nine entirely separate short stories set in World War II, each reimagining a famous fairy tale with the European theater of World War II as a backdrop, often with poignant results.

(Source: Hokuto no Gun)

It's been 6 months since the L5 Campaign, the conflict that pitted humanity vs aliens with the whole earth sphere at stake; even thought at that time humanity joined forces as a whole and fought valiantly for it's survival, now that the true threat is gone the remains from old conflicts that have kept discord among people from even before the aliens arrived have started to resurface and thus the fight is far from over....

The ATX Team, one of teams that probed pivotal in the L5 Campaign have been "living their usual" being at the mercy of the chain of command and taking part in cleaning up the remainders from the DC war---- but little do they know that again some extraordinary events are brewing up; with the arrival of a strange lady named Lamia Loveless, who seeks help from the team and seems to know more about them than what she should, the path has been set, headed towards a chain of events that might bring forth an even greater conflict that the one from 6 months ago.... Can Kyosuke Nanbu and his team break through all of the opposing forces, yet again?

The storyline continues from several months after Weiß Kreuz Glühen. It follows Aya and Ken as members of an assassination team named Krypton Brand Side B in Great Britain. Weiß is no more. Of the original Weiß, only Ken and Aya have found their way into Side B.

Unfinished space science-fiction manga by Otomo Katsuhiro.

There are dangerous monsters called D's, lurking in the shadows of the world. A D mimics its victim's form exactly, allowing it to kill its victim and take its place. Kei, a normal high school kid, learns of these creatures when one of them targets his childhood friend Hinata. In his effort to protect Hinata, Kei finds himself being dragged into the affairs of Othello, an organization formed to bring about the extinction of these creatures.

In a world where demons have haunted humans since ancient times, Rose and Marie are on journey searching for their missing brother while at the same time following in his footsteps as a hunter