When Lord Dahn-Guh "accidentally" unleashes powerful demons unto the land, he orders the fool Ondal to recapture them! Unable to fulfill the task on his own, Ondal is accompanied by Hae-Moh-Soo--a legendary, foul-mouthed warrior who helped to trap the demons in the first place--and...David Copperfield?! Along the way, they come across quite the interesting array of characters: a gang of armed nuns, the mysterious Samson with singing powers, the twins Pai and Pei, and so many more!

From Tokyopop:
An ancient seal has been broken, sending a flood of demons into the mortal realm. Hizuru Oborozuki and Takuya Hijou, descendants of the great savior who banished the demons in the past, must fight the evil spirits using their mystical powers. In order to give the world a fighting chance, Takuya uses his music to transform Hizuru into a beautiful warrior. Some things are worth fighting for, but is the Earth one of them?

From Tokyopop: After the abduction of his brother Kotaro by the Machine Empire, Teppei Takamiya joins forces with X, one of several highly-advanced, artificially intelligent machines known as B'ts (pronounced 'beat'), to rescue him.

From here:
Sunao always thought she'd fall in love when she started junior high school. But there aren't any attractive boys at school. Still Sunao doesn't give up and meets two handsome upperclassmen. The kind and sensitive Toru and the cheerful and friendly Kaoru are members of the school Magic Club, which Sunao also joins. Then she finds out that Toru and Kaoru are actually thieves known as "B-apostrophe" who need Sunao's help as a master of the martial art Shinbu-ryu. They are trying to find the treasures hidden by the illustrious thief from the Taisho Era.

According to the legend, whoever finds seven glass balls and solves the seven secrets, hidden in each, will win treasures worth 30 billion yen and learn a strange magic secret. Sunao is surprised by this and becomes part of the team because she is attracted to the boys. It's like being in heaven surrounded by two such beauties.
But they are not the only ones after the treasures. Somebody called "B" always gets in their way. "B-apostrophe" might know who "B" is... Sunao is swayed by her complex feelings: She likes Toru, but occasionally feels a pull towards Kaoru and even to "B" when he makes contact with her!

Leto is employed as an apprentice by the skilled mercenary Alpha, from the mercenary unit Boreas. He struggles to rid himself of his apprentice status and be accepted by Alpha. However, as a mercenary, many painful encounters and terrible experiences await him…

A series of fairytale-like stories, loosely connected by the ongoing adventures of the enigmatic Hwa Ryungang, a man with strange powers and a connection to the spirit world, and Moohwe, an irrepressible wanderer with a mysterious past.

After being bullied at his old school, Makoto wants to be the main character of his own story. When he finds a bill with his face on it on a school trip to Kyoto, he takes it as a sign, which leads him to fall into a river. Once he comes to, he realizes that he has been transported back to the period of time in Japan known as the Bakumatsu!

Kazuki's had a 16 year grace-period of peace and relative normalcy; smuggled to Japan and raised by a kindly old woman he's grown up to be a bright and friendly boy. His childhood friendship to the girl next door is just beginning to blossom into romance and the death of his ward leaves him with enough character-building angst to set him up for just about any cliche shoujo adventure Yukari Ito has in mind. Unfortunately, Yukari Ito is TOTALLY insane and has decided to make him a vampiric kitten engaged from birth to a Nightmare. (from doki-doki)

"Basara - The spirit of freedom which denies old authority, transcending traditions and customs."

Born under a prophecy that will liberate and unite Japan, Sarasa has had to take her brother Tatara's place as the "Boy of Destiny." Fighting for the oppressed, Sarasa journeys across Japan to gain allies and defeat her enemies--all while keeping her identity a secret!

Basara won the Shogakukan Manga Award for shoujo in 1992.

Futaba, a boy that has grown up in an overprotected family, suddenly finds himself on the other side of the world, where he meets Kiara, the Amaranthine. They journey to find Kiara's true master, and along the way they meet a curious cast of characters, including the wizard Belbel and the prince Virid.

Pronounced - Bee heun From: Easy Going Scans There are some heroes whose names you do not know, whose faces you have not seen... They operate secretly, and their actions can make a difference in the outcomes of wars. Be Huen is the story of such a man. To follow his story, one must search in the shadows, for that is the only place you could find him... Webtoon from Naver Please address this work as a Manhwa (Korean word for cartoons)

Tsutomu Nihei returns with another addictive manga (see BLAME!), set in the not-so-distant future (3005 A.D.). It follows a character by the name of Kanoe Zouichi and the mysterious Kanoe Fuyu whose luminous form is integrated into the system of his bike. They are agents sent by a powerful organization to retrieve the human with the ability to resist and transmute the NS5 infection that is spreading across the world, named Yion/Ion Green. However, their mission is delayed by the reckless actions of the Public Health Department's taskforce and the kidnapping of Yion/Ion Green. Will they complete their mission? Where has Yion/Ion Green been taken? These questions will only be answered as more volumes are released. The art in BioMega is similar to BLAME!, with its complicated concrete sprawl and ludicrously wide, empty spaces. However, things seem to happen at a more reasonable pace. In this manga, there is emphasis on the swiftness of the attacks made by Zouichi, such as the gun being sheathed just before the enemies fall to the ground. Speed is crucial in this manga, unlike in BLAME!, and the plot develops just as quickly. An interesting read, especially if one has enjoyed BLAME!

Man is having a hard time finding food and getting rid of their trash, so science comes up with a bio-engineered animal that survives by eating trash, and is then killed to feed humanity. But the self-replicating, endlessly hungry killing machine gets loose in Tokyo...

In the days of war, a baby fused together with a "shadow" called Blue Dragon, a legend among the "shadows". Because of that, he was locked in darkness from birth until recently, 15 years later, to prevent his shadow from activating. From the beginning, the only person he knew was his tutor who would come see him everyday. But "shadows" have begun to run rampant as they escape from "Noir" through living beings. Humans call for the release of Blue Dragon in order to help mankind; thus their journey begins to seal the "shadows" along with the strongest: their queen.

Well, meet Nekoyanagi Kennosuke, a mysterious man who claims to make his living as a miraiya - one who "deals with the future”

Just when Yamamura Fuuta is looking forward to his last summer vacation as a grade-schooler, the self-proclaimed miraiya barges into his life and turns what should have been an idyllic vacation into a series of events shrouded in mystery and filled with spine-tingling encounters. Strange things begin to surface all around the skeptical and unwilling Fuuta.

This is a manga adaptation of Hayamine Kaoru’s novel of the same name. Squeal, gasp, cringe, tremble, but don’t forget to peek between your fingers from time to time as mangaka Takemoto Itoe adroitly transports you to the quiet, fictitious, rural town of Kamikushichou, where the woods are brimming with life in the vibrant Japanese summer.

From Neptise Scans:

Dracul's presence threatens humanity and the only ones who can stop them are the Exorcists, siblings bound by blood and granted the power to purge evil. The story centers around Vincent and Ryan and their struggle to become full-fledged exorcists.

In the years following a great civil war between the Light and Dark Dragon clans. The Light Dragons are dwindling, reduced to hiding in small villages. The protagonist is Ryu, a young Light Dragon who awakens one night to find his home set on fire by Dark Dragons. After his sister is captured in the attack, Ryu sets off to rescue her. In the process, he joins a race to uncover seven mystical keys, before the Dark Dragons can use them to unlock a goddess of destruction.

After her grandfather's death, Mikura chose to continue their island express courier service. With her seaplane and her adventurous cat, Endeavor, she lives life as she chooses. Soon, Mikura becomes very interested in a mysterious island that seems to move around, according to local legend. After some extensive effort to determine the island's whereabouts, she manages to get a brief glimpse of it from the sky. Now that she knows it's real, she's determined to find the island again, no matter what it takes!

From Fifay.net:

Tokyo, 2002. Tatsuaki dares to learn something novel to the most of Japanese: Beijing Opera. One day, he receives a Kouu mask from his master. Just for fun he put it on and is instantly transported back to Beijing, circa 1924! So begins Tatsuaki's adventures in the Beijing Opera House.