From Manga-Updates:

Hot blooded manga about... writing manga. There are actually a few series starting with Moeyo Pen (Burning Pen), then later on came the sequel series Hoero Pen (Shouting Pen).

A short overview of the life of Oda Nobunaga, as told from the perspective of a ninja fighting other time-travelling ninjas!

(Source: SystematicChaos/Hokuto no Gun)

One bright fall day, young Takisawa Noboru transfered to over to Honjakuniku High, arriving an hour after the start of classes as the principal instructed him. Everything seemed to be going fine, until the mildly overzealous hall monitor Jonichi Koichi decides to charge him with tardiness, and administer punishment...see in THIS high school, any argument can be won through sports or combat, leaving Takisawa in a bit of a pinch until the lovely Yukari steps in and saves him from making himself even later than he is. But that`s just the start of Takisawa`s troubles...the school tough, Ibuki Saburo, has set his sights on both mashing the new meat to a pulp, and winning the hand of Yukari away from any potential suitors...in the boxing ring!

Will Takisawa be able to defeat Ibuki, win the love of Yukari, and still make it to Calculus on time?
Of course, it`s all in a day`s work for a Blazing Transfer Student!

The manga consists of nine entirely separate short stories set in World War II, each reimagining a famous fairy tale with the European theater of World War II as a backdrop, often with poignant results.

(Source: Hokuto no Gun)

Gambling. Mahjong. Death. These are the themes of this fast-paced, undercover-agent-style manga where outrageous life-or-death gambles are made daily occurrences and insurmountable odds are overcome. The most hardcore, action-packed mahjong manga you will ever see.
(Source: MU)

Persistent mediocrity hasn't dissuaded Fukutsu Toshi, captain of a lame high school baseball team, from his love of the game. But when the principal, dissatisfied with their losing performances, threatens to take away their playing field, Toshis is forced into action to turn things around with all out efforts. But facing him at every turn is endless adversity. Nothing is ever easy for him, but luckily, Toshi has the determination to beat it all. (Source: MangaNews)

"A hero" is a job that in the face of danger and adversity or from a position of weakness, display courage and the will for self sacrifice. Would you like to work as such a hero in our company? You may transform, manipulate a huge robot or fight as a squad. Shall we realize your dream in our "Hero Company"?!

(Source: MU)

This comic tells about 'behind the scenes’ the life of a Japanese professional comic artist. Every day of busy work that could not be separated from the deadline, the editor demands, sometimes not only affected the comic readers, even the author himself and his assistants are affected by the comic, how comic artist get along with the people in unusual way, and all the story is delivered with hyperbole.

This comic is full of overflowing passion. The super excited assistant and always alert. Fiercely editor. Endless deadlines. There was no day without any surprises in Moyoru Hono’s life as a comic artist. Quite often he had to choose between idealism or his editor demands. Everything finished in his pen strokes.

In this story set in the early 1980s, a young man dreams of becoming a renowned comic writer in years to come. His name is HONOO Moyuru. He has no money, only a dream. Then, he feels overwhelmed by his lack of ability, and buys some sake, although he has no head or stomach for alcohol. This is a tortured elegy for any dashing young art student who spends his days careening around in burning ambition.

A boy is very enthusiastic about garage kits.