It was just a normal day for Kokoro and his friends, until they received a grim shock: their world had been invaded by dragons! These vicious dragons consumed every human they saw, and destroyed everything in their paths. Japan’s military turned out to be useless against these creatures. Just as all hope was lost, a mysterious classified military division appeared, with knowledge of these dragons’ secrets. What is this unknown division? How do they have information on these never-before-seen dragons? Where did these dragons come from? What is their purpose? Who is their leader? Can Kokoro and his friends unravel these mysteries before it’s too late?

Fateful Encounters:

Saitou Yakumo, a college student, was born with different eye colors. His red left eye gave him a special ability to see ghosts and spirits. He believes ghosts and spirits are bound to earth because of a certain 'cause' and simply by eliminating that 'cause' will help those spirits rest in peace. Being asked for help by Ozawa Haruka, together they begin their investigation.

In order to treat his sister's mental illness, the young man Leo resorts to treatment through magic. There, he meets a magician, Oswald, who enters the patient's psyche in order to treat them. In a world filled with Madness, will they be able to save the patient's heart and get out alive...

One day, Nana, who has always wanted to get married, has a fateful encounter. Unfortunately, she had to endure violence since the marriage, so she decided to kill her husband and put his corpse in a freezer, but things aren't always like one want as she finds out when he comes back…

In this story, Nagai gets his folklore on with every chapter containing a lot on Buddhist lore or Japanese folklore. The prologue introduces us to Heaven, Incorporated, a company with a particular staff that hunts down all sorts of supernatural monsters and protects humanity from them.

One day, the colossal tower, "Babel" suddenly appeared in the city of Tokyo. High school student Taiga holds a belief of, "Not standing out is the best." While he dreams of chasing after his sister from the self-defense forces who went missing inside Babel, his daily life still continues to be boring, and the same as usual.
However, on one certain day, the "time to fight" finally confronts Taiga! Young man, fight and survive in the tower! Grasp it! A new era filled with a battle of "superpowers" and an "unprecedented" tale of survival, begins now!

A battle between a girl who doesn't want to move from her haunted apartment and the ghosts who are desperate to haunt her & make her move away.

The hostess Lingyue was murdered by her best friend and her husband... In order to hide the crime, she was thrown into the wilderness. There, she was possessed by spirits and filled with hatred, she started on her path to avenge her death...

From ANN:
Many good things are linked with water, but not here. From the murder of a small child whose body was never found, to the creatures that lurk in the depths. All the tales are linked to water, and each conclude with a shocking end.

From Wikipedia:
A manga version of Koji Suzuki's book Dark Water, illustrated by Meimu. Just like the book, it's a collection of short horror stories linked to water.

Youkai are specters who have lived in the human world since the dawn of time. They often rest peacefully in their dwelling places, until humans rouse them by inconsiderate actions. Kitaro is a young youkai boy who wants to help humans and youkai live in harmony, and he fights to protect humans from the enraged youkai who lash out at them.

Note: For Kodansha's version of the series that began in 1967, the first volume is titled "Hakaba no Kitarou," but volume 2 and upwards are titled "Gegege no Kitarou."

English Titles
Vol. 1: Kitaro
Vol. 2: The Birth of Kitaro
Vol. 3: Kitaro Meets Nurarihyon
Vol. 4: Kitaro and the Great Tanuki War
Vol. 5: Kitaro's Strange Adventures
Vol. 6: Kitaro the Vampire Slayer (January 2018)

Taken from Coffee Scans: A village, hidden in the forest, holds mysteries… But what happens when a foreign girl enters it?

The fantasy masterpiece, which once caused an uproar in Korea with more than 10 million copies sold, is now in the public eye again as a webtoon.

Hyun-Am trains in Tai Chi Qigong in order to fight the water ghost that killed his sister.
Father Park, unable to save his friend’s daughter from an unknown evil spirit, chooses to become a priest walking the path of asceticism.
Jun-Hoo, the only survivor of Eastern Sea Esoteric Buddhism, is a genius who has inherited all the magic of the five guardians of Esoteric Buddhism.
Seung-Hee, who has a secret, gets involved in a mysterious case due to her father.

An occult fantasy in which individual exorcists, each driven by their own causes, solve crimes and fight together against evil demons. Demons who rule the spiritual and emotional worlds of mankind, and drive society into chaos.

The demon in human form. An innocent girl sacrificed. Kazumi Ichinose. 16 years old. high school student. Midou Saki fell in love with him when he was an elementary school student. That was the beginning of hell. Jealousy. Obsession. Pools of Blood. Tears. Death. Common sense, words, nothing makes sense. Misfortune befell those loved by "him". Love starts with blood. This is the beginning.

Dohoon can’t find a reason to live. He hoped to get a fresh start at his new high school, but things are no different—the bullies make fun of his limp and no one wants to be his friend. Then one night, he runs into a classmate, Aji… Having seen something he shouldn’t, the two make a deal: Aji will protect him for the time being, but when he turns 20, Dohoon will have to pay up.

Hideo Suzuki is a thirty-five year old mangaka assistant struggling to be the hero in his own life by breaking back into the lime light with a new serial all the while juggling his relationship with his girlfriend and his own delusions. However, as hard as Hideo may try, the world seems to have a different set of plans for him; sinister and dark machinations that completely overturn his reality as he knows it. Nominated for the 3rd and 4th Manga Taisho Award (2010 and 2011).

Story 1: Satsuki have a boy who want to fulfill all of her wish, even from afterlife.

Story 2: About a haunted house.

Story 3: Why a boy who was supposed to die still moving around and the teachers seems to hold a secret?

Beware the red snake! Told from the perspective of a young boy, The Red Snake is a story of the above boy, the house he inhabits, and the forest around his house that stretches on and on. The characters in the story are all mad: his grandfather, who sports a massive growth on his jaw; his grandmother, who believes she is a chicken; his father, who is vicious to the chickens he raises (except for his mother, to whom he provides eggs that so that she can claim she laid them herself); and his sister, whose affection for insects borders on the erotic. The story evolves into a classic nightmare.

The Hino Horror series:
Hino Horror Volume 1: The Red Snake (赤い蛇 Akai Hebi)
Hino Horror Volume 2: The Bug Boy (毒虫小僧 Dokumushi Kozou)
Hino Horror Volume 3: Oninbo and the Bugs from Hell (地獄虫を食う! 鬼んぼ Jigoku Mushi Woku! Oninbo)
Hino Horror Volume 4: Oninbo and the Bugs from Hell 2
Hino Horror Volume 5: The Living Corpse (死肉の男 Shiniku no Otoko)
Hino Horror Volume 6: Black Cat (黒猫の眼が闇に Kuroneko no Me ga Yami ni)
Hino Horror Volume 7: The Collection (M Collection)
Hino Horror Volume 8: The Collection 2
Hino Horror Volume 9: Ghost School (Ghost School (HINO Hideshi))
Hino Horror Volume 10: Death's Reflection
Hino Horror Volume 11: Gallery of Horrors (Kyoufu Gallery)
Hino Horror Volume 12: Mystique Mandala of Hell (Kaiki! Jigoku Mandara)
Hino Horror Volume 13: Zipangu Night
Hino Horror Volume 14: Skin and Bone

Six months ago, Karukozaka High School was sucked into the demon world, and in the ensuing chaos, only two survivors emerged: Nobu, who defeated the Demon Lord that took over the school, and Yumi, who possesses latent demon powers of her own.
Although they're both trying to put the incident behind them, the gateway to the Underworld remains open, and soon Nobu finds himself battling demons right on the streets of Tokyo. The reason for this infestation is simple: a secret organization is trying to establish a Demon Kingdom on Earth by summoning demons through the gateway.
Nobu and Yumi are the only people to have been to the Underworld and survived, so they may have the power to stop the infestation but before that can even happen, they'll have to find each other first.

13-year old Rachel awakens to find herself trapped in the basement of an abandoned building. Without any memories, or even a clue as to where she could be, she wanders the building, lost and dizzy. In her search, she comes across a man covered in badges. He introduces himself as Zack and he wields a grim-reaper like sickle. A strange bond is struck between them, strengthened by strange, crazy promises… These two, trapped in this strange building, don’t know why fate has placed them there. But they will work together desperately to find a way out…

A sophisticated collection of tales, ranging from the macabre to heartwarming to wacky. The trials and tribulations of daily life.
Volume 1: P no Higeki
Volume 2: Senmu no Inu
Volume 3: Akai Hanataba
Volume 4: Unmei no Tori