Set in Yokohama, this is the story of a vampire with a death wish and a priest with a "survival wish."

After hundreds of years, Mary - an immortal vampire who wants nothing more than to go to his final rest in peace - manages to discover the whereabouts of Maria, a legendary exorcist who has "Maria's Blood," which can be used to kill immortals, running through his veins.

However, this particular Maria is merely a descendent, and is himself clueless about vampire hunting. Despite that, having inherited Maria's Blood means he's constantly being targeted by vampires. Mary thus makes a deal with Maria: in exchange for Maria's discovering a way to kill him, he will protect him from those who're after his life.

Note: This manga is not BL.

A strange case occurred in London at the end of the 19th century. What is the true face of the vicious criminal roaming the city? The famous masterpiece epitomizing the phenomenon known as split personality is adapted into comic format!

A number of strange events are taking place in a curious town called Otonari. What is this mysterious girl, Punk, trying to achieve as she races against time?

After 12 long years, a white-haired boy by the name of Iori comes back to Mashira village, the place where his childhood trauma began, only to find yet another horror awaiting him.

Sakurai Mikito is a wimp who is constantly bullied and never fights back, as he doesn't want to hurt others.This all changes when a mysterious sphere enters him - Zakuro. He soon begins to feel different feeling desires to eat... humans. Is he still human, or will he succumb to his desires and fully become a monster?

Tomo fears that "The Underneath the Bed Man" urban legend may be true even though her best friend Sayoko says that it's just a made-up story...

The story takes place at a high school that starts voting for the most popular kid, where losing the popularity contest means death.

Salvation may be at hand, but now is the time for prayer... Judas, cursed for his sins, is the spirit of Death--he is without form, and has enslaved young Eve to carry out the most heinous of acts. Together in spirit and body, they must slay 666 people--so that Judas can regain his humanity!

Sanpei is bullied at school and mistreated at home. His only real friends are his pets. But when he gets stung by a strange insect, Sanpei's life changes forever! Transformed into a huge poisonous bug, he escapes to discover the world outside. There he finds only more hatred, and eventually he returns to exact a terrifying revenge.

College student Sara Washizuki was shown a mysterious film photograph by paranormal photographer Tousei Ryuuzaki. In it was captured something she had left sealed away with her memories of a particular incident in her elementary school days… Based on the hit video game "Fatal Frame."

A small group of adults have been invited to a reunion at their old high school to remember the loss of their classmate Kiriko, after receiving a letter "From K."

Not knowing who "K" is, Ryosuke, a young man with short black hair that used to know Kiriko, has to uncover the truth of Kiriko's mysterious death. As he slowly regains his memories and his fellow classmates start suddenly dying around him in the most horrific manner, he realises that it's far too late to say sorry.

Many Shonen Jump characters have big dreams, but this character's big dream is a nightmare! A very realistic reoccurring nightmare where a giant monster destroys a city. And it always ends with Ko, the poor dreamer, getting crushed under the rubble. But when Ko meets an unusual man who somehow knows about the monster in his dream, his nightmare takes on a whole new meaning.

From Shinnen:

Naraka High School is a seemingly normal school. However, unknown to the public is the cruel truth of what really goes on in the school's halls. Rather than studying, students are forced to struggle for their very survival. And the strong bonds of friendship may be the only difference between life and death.

A manga adaption of the Betterman anime.

Dolls Fall revolves around the lives of students at Jiaiin girls dormitory, an orphanage for middle school children without families. They are greeted with open arms by the matrons and other students, taught to accept their fellow orphans as sisters and the matrons as their mothers.
Jiaiin is a safe haven for students, provided that they follow two simple rules: at night, lock your door and don’t leave the room, and never enter a matron’s room.

A group of high school girls conduct a test of courage for kicks, but something dangerous begins to threaten their everyday life.

A traditional suspense horror begins!

Humanity wakes up to find that they've all shrunk. Can they survive amidst the hazards that Nature entails?

This is the story of young Alice and her protective dog Poco in this new world.

A one-shot about a strange curse visited on a family after an archaeological dig.

One-shot in celebration of 30 years of Itou Junji's career.

From MangaHelpers:
The high school columnist looking for the next big story gets more than she bargained for when she digs into the wife of a man she meets. The female anime characters that the class nerd draws become real and over protective of their creator. The monster behind the old child’s story haunts the people that break the rules of the contract. These are some of the episodes in this collection of short horror stories.