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

Included in the manga is a oneshot called Nana-chan Scrambles.

From xkazemg:

Ootome Hime’s father was a jockey who dreamed of winning the Japanese Derby. One year, when Hime went to watch him race in the Derby, he died in a horrible racing accident. The man responsible retired in guilt from being a jockey.

10 years later, Hime is in high school, and she has heard that Arakawa Jin, the son of the man who killed her father, is debuting in the Derby as a jockey. She went to see him race, and was outraged to see him win! Now Hime has decided to quit high school and go to a special school for jockeys, in hopes of being able to beat Jin in a race one day. She has met a new friend and aspiring jockey along the way, a boy called Tadano Ryouhei, but she can’t let him stand in the way of her revenge!

Welcome to the world of baseball. Where there's an abundance of attractive athletic young men.

The story is about a professional baseball team and the interaction of the members. Drama and comedy abound the different couples.

When 10-year-old Kaneda Shota was involved in a car accident that claimed the life of his father, it changed the course of his life forever. Even though his mother got a job and tried her best to support her son, money was always tight. Now, unable to afford college, Shota works a part-time job, in addition to his full-time job at his uncle's factory. He dreams of one day saving enough money to go to college. He lives alone, on the second floor of one of his uncle's warehouses, and doesn't have any friends. Everywhere he goes, he rides a bicycle, with headphones to block out the flashback-inducing sounds of the cars.

His quiet way of life is about to be interrupted. Due to pressures from the economy, Shota's job at his uncle's factory is going to be cut to half-time/half-pay for a while. In addition, Shota's uncle has agreed to lend the first floor of Shota's warehouse to a college club. This club is building a solar car to enter in a race, and they're hoping to get Shota to lend them his mechanical expertise. Will Yazaki Junko and the other club members be able to handle Shota's anger and bitterness, and draw him out of his self-imposed isolation?

From Chibi Manga: "That was the highest fever I never had. Because of those guys." When I entered in high school I met the team of “tsubasa ga oka D.C” Those guy were so problematic but looked like Host! That’s what I thought at the beginning… “…bet with us Alice, bet with us!” “I’m going to ridicule you guys!” “Let’s make a deal. If I lose, you’ll have my first kiss” If it’s Takeru-kun, I can bet anything. I can give him every “first things” of my life.

SERIES 7: Steel Ball Run
It's the seventh instalment of the JoJo saga and takes place in the wild west in 1890 (about the same time period as the first arc of JoJo).

From: MAL The story of a boxer who's been undefeated for nearly 10 years and has thus earned himself the nickname, "Zero."

The story is about how and why a guy goes from a worker at a dead-end job to becoming a boxer.

From Viz:
All that matters to 15-year-old Nobara Sumiyoshi is volleyball--she's an awesome player with big-time ambitions. But sometimes it seems like a girl just can't get a break in the competitive world of high school volleyball.
Nobara's family wants her to inherit the role of "young mistress," serving rich patrons at her family's old-fashioned Japanese restaurant. No thanks! When Nobara transfers to Crimson Field High School, known for its top-notch volleyball team, it turns out that her mother will stoop to dirty tricks to keep her off the court. With assistance from her feisty Aunt Momoko, who's got some connections at Crimson Field, Nobara decides to start playing offense.

From Easy Going Scans:

Leesu came from a poor family but he didn't mind at all not having any money or status. Being the school's strongest fighter made him feel as if he was on top of the world in his eyes. But alas, a car accident made him lose what was most precious to him; His ability to fight! Craving for his past glorious days he turns to fencing with the hope to regain what he once had?

High schooler Torii plans to get the girl, even if she is his teacher. The teacher plans to grow up and leave behind her basketball-playing youth. In basketball, planning and strategy can win the game, but is that also true for real life?

From Shogakukan: Ping pong. Table tennis. Fast, furious. You might have seen it, even played it, but you've never seen it like this! The action centers around "Smile" Tsukimoto and "Peco" Hoshino, two high school students in the midst of adolescence and out to prove they've got what it takes in the cool, cruel world of sports. This manga even got adapted into a live-action movie.

[From Condensation]: Sagara Yuki is a high school student who's shorter than all the other guys in his class. Moriyama Miki is the girl who admires him despite his small stature. Follow the hijinks and the romance between Sagara and Moriyama as they become closer and conquer the obstacles to their love! Was soccer mentioned? This is a super cute and funny manga. Volume 01 is a prequel to the actual series which begins in Volume 02. * Contains the following short stories: • I Want to Protect You (Volume 1) Yuka is in love with her childhood friend, Haruki. The problem is that Haruki has a peculiar body condition - when people get near him, he gets attacked because of his pheromones. What will happen when they start dating? • Valentine Nanka Kowakunai!? (Volume 4) Moe-chan plans to give Kyou-kun her homemade chocolate, but will she be able to when the rest of the male student population are after it too? • Mousou Otome (The Delusional Virgin) (Volume 6) High school girl Chihiro is, in fact, a shoujo manga author! She bases her manga on her wild ideas with her first boyfriend, Izumi-kun, but she's keeping it a secret from him...? (1st oneshot in Megane - Hazushitemo Ii desu ka?)

From Shoujo Crusade:
Yui has always loved Koutarou to the point that she became the manager of the athletic team. One day Koutarou confessed to her and they become a couple. Will there be heaven or hell waiting for Yui?

15 year old Kasumi Kishimoto arranged to stay with her aunt when she entered high school. Upon ariving she is surprised to learn that there are four other people boarding there, all of whom are male and attending the same high school. And when one of them walks in on her bathing on her first night there, she wonders what she's gotten herself into.

From Selene Scans:

New school, new teachers, a new class, new friends... and basketball.

All these things that Ishizuka Sakura are looking forward to are rudely interrupted by the fact that she's running late on her first day of high school! Everything is a mess with her being told the wrong directions to the auditorium, and after school when she looks to relax and play some basketball... she meets the legendary Miyamoto Hayato and Tadashi twins.

She wants to team up with them, but will they accept...?! Read and find out!

Yuzuru is a fifteen year old girl who is attending her first year in Houjou Academy. At her summer job, she met a troublesome rich boy, Renge Kai, who is attending the same school as her. Kai is part of the Kugeka, a class opened only to the rich students of Houjou.
At the end of the summer break she finds out that she has become Kai's "Honey". This nickname is given to all the students from the regular class choosen by the Kugeka to become their assistants, so that the rich boys can be successful without any problem. The up side to being a Honey is that all their school fees will be taken care of.
Although Yuzuru's family has some financial problems, she doesn't want to accept her role of being Kai's honey. But the only way to quit is to leave the school... What is she to do?

Ever since middle school, Takahiro Ozu was famous in the world of track and field as the "long jump specialist”. But after losing his final competition in high school, he hung up his track shoes for good. Now in college, having taken up smoking, he just wants to get a girlfriend and lead a normal student life. Noriko Watsuki has had a crush on Takahiro since she first saw him jump and wants him to join the college track team so she can get close to him. Yuki "The Headphone Girl" Hoguchi, a high school student who likes to hang out at the university, claims Takahiro took her virginity 13 years ago when he was in kindergarten. She considers him her property to do with as she pleases. Throw in a full cast of zany and unique characters, sprinkle with fan service, and you have the world of Inu Neko Jump. From Animewaves

Satoyama Katsuki is a carefree 15 year-old high school kid, and a pretty lazy one at that. However, he secretly has a crush on a girl who happens to share his name: Mizutani Katsuki. Upon finding out that Mizutani's father used to be a pro-boxer, and she herself infatuated with the sport, he reluctantly joins a boxing gym in order to impress Mizutani. Satoyama is quick to find out he may have the blood of a genius boxer running through his veins...

A school mahjong story about the everyday life of middle schooler Asakura Yoshiaki, his classmates, teacher, underclassmen, and the other members of the mahjong club.