"In this world, there are all kinds of perils! I'll teach you how to save yourself from those dangers, you moron!" So says Dangerous Jiisan, always looking out for his grandson. But, lacking any common sense, he usually makes things catastrophically worse in ridiculous, funny ways.

It's a children's gag comedy largely done in manzai style (funny man vs. straight man). Most of the jokes are silly, with ridiculous occurrences, puns, poking fun at popular culture, and breaking the fourth wall, but there is some subtle humor in places, too. Zettaizetsumei Denjarasu Jiisan received the 2005 Shogakukan Manga Award for children's manga.

Summary from: Pinoymanga Scans
Kiriko and Takuto are cousins. They often spend a lot of time together. What no-one around them knows (including their parents) is what transpires behind closed doors when they are alone together...

From Viz media:

Timid and self-conscious high-school student Karin never paid much attention to boys until she met Kiriya, a popular student from a nearby boys' school. Karin and Kiriya embark on a romantic journey despite Karin's classmate Yuka's best efforts to sabotage their relationship, but Karin soon learns that living happily ever after isn't on the curriculum when she becomes Kiriya's center of attention, as well as embittered Yuka's bull's-eye on her dartboard of hate.

Kazan is an adolecent whose family and friends were killed when he was still rather young. As the sole survivor of the Red Sands tribe, he has wandered since the fateful day the water demon stole Elsie, and destroyed his "village". He eventually meets up with a young girl named Fawna, and an old woman named Arbey, and they begin their adventure, on the road to Goldene, each seeking answers of their own in this strange city.

Katori Itto and Yura Kazuma are childhood rivals. Itto is small and quarrelsome while Kazuma is big and vindictive. Itto has been holding a grudge against Kazuma for a long time from the scar Kazuma made him five years ago during a fight… After years of travelling with his father, Itto finally returns to Japan only to reunite with a childhood rival, Kazuma. A very hilarious combination of circumstances will bring the unpredictable Itto to join Kazuma's soccer team at Seiga Middle School… The manga follows this wacky duo as they, alongside the rest of the team, 'battle' other middle school teams on the road to becoming Japan 's best. The intense footy goodness is only second to the ridiculously hilarious situations that Itto somehow manages to find himself in.

The story follows the crazy misadventures of Kaizo Katsu, a former child prodigy turned weirdo after his female childhood friend, Umi, kicked him off a jungle gym in the playground, and he got a huge bump in the head. With this set up, Kaizo (believes he is a cyborg) and his classmates, Umi (will go revealing her dark side with every chapter), Suzu, and Chitan (an inferior being?), will treat in every chapter a different topic of life with the hilarious and interesting way of thinking of the author Kumeta. The attacks of different geniuses/weirdos will create a lot of funny situations.

Included is a story called Yuuryoubukken Chuukaishimasu (A Brooding, Gloomy Property) in Vol. 13: A young man moves from his hometown to Tokyo to attend university there and looks for cheap accommodation. He does indeed find something, but what is the non-monetary price for this?

From Midnight Scans:

Koyuki started dating a super handsome guy named Kanomitsu, who is known as the Prince of Ice because of his cold words and manners. Being touched by his true kindness and straightforward love, they were able to live a peaceful life, until his brother suddenly makes an appearance. That's when she discovers the truth of what had made him lock away his heart...

Also contains two extra oneshots n the volume

Ch 5: Aioki Koi no Hajimari

Ch 6: Yume Miru Koigokoro

In her middle school days, Hiyori only has eyes for Mizuno, a popular guy in school. She then partners up with Sasamoto Ren, Mizuno's best friend, and both hatch a plan to bring her and Mizuno together. However, things begin to change, as Hiyori and Ren grow closer, and they find themselves falling in love... with each other. As old loves fade away and pave way for new ones, obstacles also threaten to tear them apart, especially Ren's seemingly innocent but scheming friend, Kotone, who shares a past with Ren and isn't about to let him go.

From huamulan03.blogspot.com:

3 January 2011. ER doctor Matsuoka Tsuyoshi examines a patient presenting influenza symptoms. The next day, the patient dies from multiple-organ failure, followed by others who had shown the same symptoms. As the death toll rises, even the high-tech Japanese are at a loss over how to check the further spread of the deadly virus

A super-deformed version of Kannagi created by the original author's brother.

A high-school student has been seeing visions of a girl in his dreams, when suddenly he meets her at school. Oddly, they can both see (and touch) each others guardian spirits. What is relationship between them, their guardians and the truth behind the dreams?

From Storm in Heaven:

Akiba Takara, top student and vice-president of Kanou High's student council, has it all going for him. Or so it seems. Cursed by the goddess Kanou to remain in Kanou City until he fulfills a hundred people's wishes, Akiba's dream to control the world is in jeopardy. Then one day, Akiba and his council receive a strange task -- to find the god hidden in their school within one month, or perish together with the rest of the world. Will they find the god in time? Or will they be wiped out, along with Akiba's grand ambitions? Now let the game begin...

The manga is a “somewhat realistic” office drama story depicting the behind-the-scenes life in an anime studio. The protagonist of the story aims to become a first-class animator, and the story begins just as the protagonist realizes the personal goal of entering the industry.

Shizuku Kanzaki is the son of a recently deceased, world-renowned wine critic named Yutaka Kanzaki. In order to take ownership of his father's legacy, an extensive wine collection featuring some of the most rare labels of the last 30 years, he must find 13 wines, known as the "Twelve Apostles" plus the heaven-sent "Drops of God" that his father described in his will.

But despite being an only child, Shizuku is not alone in this unique wine hunt. He has a competitor. Issei Tomine, a renowned young wine critic, was recently adopted into the Kanzaki family and is also vying for this most rare of prizes.

La Revue du vin de France, the most prestigious wine magazine in France, has awarded this series with the "Special Award of the Year" in 2010.

Fujiwara Naeka is a typical 17-year-old high school student. Or so we thought. She's really one of two surviving heirs of a tycoon who has the right to inherit his mass fortune when she turns 18 in half a year. Fubuki, a young and beautiful maid, and Kogarashi, a big burly maid guy with a mask, have been assigned to keep Naeka and her brother Kousuke safe from those who would plot their demise, and to steal the fortune she would inherit.

From Bliss:

Ever since they were little, Yukihisa and Takashi have always been together. However, Takashi recently started acting strange towards Yukihisa by refusing to come near of Yukihisa, baffling him. Takashi offers no explaination for his actions, causing Yukihisa to be filled with doubts about their friendship. What can Takashi be hiding from Yukihisa that's causing him to keep 1 meter away from him?

Sakuya, the lead singer for the hard-rocking band Lucifer, is the unattainable object of desire for millions of hopeful women. Aine is the demure high school student who suddenly finds herself in the middle of a raucous rock'n'roll circus. Together they're writing the book of love — one hit song at a time!

Gamu is a special dog belonging to the Kagero Clan of Japan in the 16th century. He is a Ganin - a dog ninja. Armed with armor and the ability to wield weapons, Gamu strives to defeat the evil Gama.

By Windara: It was 3002, and the human civilization had crumbled and rebuilt itself again and again over the thousand years, despite the destruction and challenge brought by the harsh nature. In this era of constant war against nature and havoc, construction teams were the star of economy system, the conquering force as well as a weapon themselves, because heavy robots were used in construction works to speed up efficiency. Jumbor was the leader of a famous construction team of a little country with a cute princess. One day, as their group was about to start a reconstruction work of a tunnel which was destroyed by an earthquake, a much more powerful construction team arrived and claimed the land in no time, killing Jumbor who tried to protect his teammates against the cruel opponents... Jumbor woke up in 3007, finding himself revived in his own clone body (memory transplanted) which has a physical age of 5 years old, and in addition to that, his body was partly mechanized. His robot arms are linked up to and directly controlled by his brain's signals. He was told that the country had gone and the princess and the king disappeared, and he discovered that his mechanized body is very powerful. He was also told he was 'last of the series'.