This is a oneshot from the 90′s Four Seasons Award Anthology.

Manga adaption of H. P. Lovecraft's "At the Mountains of Madness" novel.

The story details the events of a disastrous expedition to the Antarctic continent in September 1930, and what was found there by a group of explorers led by the narrator, Dr. William Dyer of Miskatonic University. Throughout the story, Dyer details a series of previously untold events in the hope of deterring another group of explorers who wish to return to the continent.

The story has inadvertently popularized the concept of ancient astronauts, as well as Antarctica's place in the "ancient astronaut mythology".

From CPM:

In the future, alien invasion is a daily occurrence and everyone must be prepared. Elementary School #9 has assigned three students to fight off the extra-terrestrial threat.

You have three choices:
1. Accept that you are dead and await reincarnation in Heaven.
2. Deny that you are dead, and wander the mortal world as a ghost.
3. Curse one mortal to death, and suffer forever in Hell.

In the tale, an unnamed narrator pieces together the story of an area known by the locals as the "blasted heath" in the wild hills west of Arkham, Massachusetts. The narrator discovers that many years ago a meteorite crashed there, poisoning every living being nearby; vegetation grows large but foul tasting, animals are driven mad and deformed into grotesque shapes, and the people go insane or die one by one.

Alien lifeforms have taken refuge on Earth to start their lives anew, however these beings don’t seek cohabitation, they want to phase humanity out; Working together, these Aliens prey on human flesh and spiritual energy and can implant their essence on human females to bear their children. Benimaru is one of these children, but his mother also happened to be a Medium. By manipulating Benimaru’s spirit while he was in the womb, she managed to give him a human heart. For this, she was brutally killed and devoured by Benimaru’s alien father. From that point on, Benimaru swore to exterminate these creatures. Half-human and half-alien, one man wages war against an entire race!

Minita Kokage, a man who was bullied in his past due to his unfortunate name, encounters something unbelievable while working his part-time job that causes his daily life to suddenly change.

When you thirst for revenge, there's a surefire way to get it: Simply go to the strange website that appears only at midnight, and enter the name of your enemy. The Hell Girl will appear to drag your tormentor to eternal damnation. But you will have to pay a price… your soul!

Series of stories about Parasyte, from various notable mangaka.

A series of mysterious murders without injury are happening in Tokyo, how will Kumoi Soutarou react to them? A Oneshot from Miracle Jump!

From DrCoke at MangaHelpers:
A detective hunts for clues on the impossible "alibi" of the mysterious girl, a suspect for the murder of her own parents, who testifies that she has the uncontrollable and spontaneous ability to transform into literally anything. This collection of short stories is filled with mysterious and fantastic plot, introducing you to the fantasy worlds of Kawaguchi Madoka!

A spin-off to the popular zombie manga I am a Hero, set in Nagasaki.

A black comedy about a father and son who move into a new town where everything is just plain weird as they struggle to find work and get about their daily lives

From MangaCity: Redrum 327, a manhwa by Ko Ya Sung, plunges readers into a world that's a cross between the "Scream" franchise and Stephen King's "The Shining." It tells the tale of a group of friends who plan an impromptu visit to an isolated chalet in the mountains. Their weekend getaway starts out as a pleasant idyll, but as the evening progresses, tensions rise, rifts form and conflicts occur. Soon they start to experience strange disappearances and hallucinations, and that's when their trip turns into a real nightmare.

The latest horror series from Rei Mikamoto. Follows Mio Amasato, a high school girl who controls a bizarre mechanical doll.

Every man who encounters Tomie becomes obsessed with her and eventually kills and dismembers her. But Tomie is not human, and always comes back...

Notes:
1) There is a third volume of Tomie called "Tomie: Again" which was included in the new japanese reissued two- volume version of the Junji Ito Horror Comic Collection (伊藤潤二 恐怖博物館). These new stories are not included in the original ComicsOne editions of Tomie, but are available in Dark Horse's Museum of Terror volume 2.

2) Besides Junji Ito's Horror Comic Collection (Also called Museum of Terror), in 2000 Tomie was also published in a compilatory tankoubon called "Tomie, The Complete of Tomie" -「富江」 （全）THE COMPLETE OF TOMIE-. Regardless of the title, this volume does not include "Tomie Again" within its pages.

3) Some people also consider "Tomie no kyoufu gaka" [ シリーズ富江の 恐怖 画家] as part of the Tomie franchise. Tomie no kyoufu gaka was the first Tomie's compilatory tankoubon that was ever released (It was published in 1996) and features five stand-alone stories (Gaka, Ansatsu, Mouhatsu, Youjo and Takitsubo) that were published a year later in Junji Ito's Horror Comic Collection.

Jack the Ripper; Ed Gein; Andrei Chikatilo; John Wayne Gacy; Jeffrey Dahmer - separate from these serial killers who shocked the world, there exist offenders known as "Innocent Devils", who murder without malice. A criminal psychologist and her beautiful assistant probe the depths their minds.

Stories that will fill the gaps of your mind. Gap, a supernatural series of events that hit unfortunate victims.

The shoot of an exotic tree appears in a Tokyo street. The popular affection turns into astonishment, then horror as the Jacaranda grows to colossal proportions, burning the capital to ashes in the course of a dantean night. Though, as the sun rises survivors discover that it hasn't been a night of annihilation, but of rebirth.

The year is 1916. Saya and Hagi are entrusted with their first mission in Russia at the turn of the 20th century. The grand battle between Men and Chiropterans ensues in the Romanov Imperial court on the night before the Revolution!