The 1980's was an unusual decade. The price of land skyrocketed, and the value of money went well above the norm. The numbers that defined the world all spun out of control, launching one of the largest bubble economies Japan had ever seen.

For Mahjong, as well, it was an age that saw high stakes games on a scale unlike any age before it. And in this age, a man some call "Kai" lives as a "Mukoubuchi", what true, lone-wolf gamblers are called.

From Megchan's Scanlations: Gion Kenji is short and perpetually pissed off about it. Iwashimizu Sumiaki is tall but timid. Although it's bullies that bring this unlikely pair together on the first day of high school, it's the rugby club that will make them friends.

An unimaginable talent without rivalry. Will it prove itself to be a blessing or a curse?

The manga's story centers around Sachi Maruyama, a girl who has just entered high school. In her new school, she finds that no club activities really interest her, so she is invited by an upperclassman from her middle school — now the student council president of her high school — to help with student council activities. There, she finds Karasuya, a boy she had met three years ago on a baseball field.

Chitose is an office lady who works seriously. Her childhood friend, Kokoro, is a celebrity.
He is a champion figure skater. But behind his success there are two peculiar characters: a witch and a knight. And when Chitose discover Kokoro's secret, the wheel of fate starts to move.

Lee Soo-young takes notice of Shin Cho-ah at a swimming competition. Despite telling him that she 'hates water', it turns out that there's more than meets the eye… especially when she touches water.

The Adventures of the most dangerous Yazuka in high school, 15 years old Hanayama Kaoru!!
This is a spin-off of the Baki series, showing the school years of the character Hanayama.

Japan has entered a new era called “Reiwa”, after moving past the Hesei Era on April 30th 2019. It is in this era, past the time of people like the legendary Akagi Shigeru and others like him who gambled on mahjong for a living, that a new gambler has arisen known only as “Yami-ma no Mamiya”, which in English might translate to “Mamiya of Mahjong's Darkness”.

From Habanero Scans:

"Money Is Buried in the Ground!
Natsunosuke Bonda is a relief pitcher in Tokyo Spiders. In his eighth pro season, he makes 18 million yen at age 26. But he is always troubled by how little he makes, given that he is surrounded by high income earning baseball players.
This is a relief pitcher's story in Nippon Pro Baseball, his envies, worries, sweat and tears."

Note: Was one of two winners of the Best General Manga award alongside Kangoku Gakuen at the 37th Kodansha Manga Awardin 2013.

The manga centers around Noemi Kohiyama, a second-year student at Count High School, a school with no established reputation in the world of tankery. Her first match as a tank commander is against Saunders University High School. She directs the crew of her tank with her orders, and she follows the orders of their team leader. At that time, she remembers the words that her senior said to her.

Touka is an ordinary high school girl who loves bowling. Her father runs a bowling alley, she has a crush on her former coach, and she is a pro at the game.

The only issue is that if anybody watches her bowl, she becomes extremely conscious of her body and plays poorly. To ensure this doesn't happen, Touka's best friend tries to help her overcome her shyness while bowling.

Michiru is a happy child who loves to skate. During her childhood, she meets Leon, a cute innocent boy. They begin to ice dance together. But as she has a conflict with her mom, she plans to run away with Leon. Leon, considering the danger, declines Michiru. Hurt by this, Michiru runs away by herself. Finding out that Michiru has run away, Leon and others search for her, finding her in the skating rink. But the Michiru they find standing in the rink no longer has the smile that the old Michiru had!?

Shigeharu Honda is a Japanese League batter on the rise. His son Goro is a Little League pitcher who one day hopes to follow in his father's footsteps. Momoko Hoshino, Goro's schoolteacher, is the first woman Shigeharu has been interested in since the death of Goro's mother. The destinies of these three individuals will become intertwined as father and son experience both heartbreak and triumph on the baseball diamond. But when an unspeakable tragedy visits the family, it will take everything they have to pick up the pieces and reclaim their dreams.

Note: Won the 41st Shogakukan Manga Award in the Shounen category in 1996.

From the bond between the 'princes of the snow field' - the Fubuki brothers - to a new start for the kids of the Sun Garden, to the appearance of a new coach at Teikoku Academy, along with others, this anthology tells the stories of Outer Code in a special edition volume!

From Viz:

Nobody enjoys a good fight more than "Kiibo" Miyazawa, a high-school student whose father is training him in the family's secret martial art. Kiibo dreams of becoming the next Bruce Lee, but his awesome fighting skills may soon surpass his idol's!

From the artist of beauty
Open the door to a new world of fantasy ------ !

Everyone wants a fresh start in high school and that applies ten fold for Toujima Asahi. She hopes that she can create a new image of coolness at Futatsuzaka High School; a school that used to be all girls until recently, which explains the female population being 5 times that of the male and the extracurricular activities being female oriented. Change isn’t as easy as Asahi thought and she is introduced to Maharu, a strong minded girl, and to Naginata, a sport similar to kendo. Asahi realizes that Naginata is what she needs in order to become a new person, as the sport allows even those who are not the most athletic to shine on a national level.

A group of wild, unruly teenagers who become friends due to their shared passion for skateboarding.

La historia se centra en Himari Kohanai, una estudiante de 15 años que odia ser torpe. Quiere pasar página en la preparatoria, pero es un desastre, sin embargo, y a pesar de todo, Himari hará cualquier cosa para acercarse a la persona que admira. Aunque sea meterse en un mundo totalmente desconocido... Una historia donde poco a poco nuestra personaje principal crecerá para alcanzar su meta.

(google translate of above with minor editing for gender): The story centers on Himari Kohanai, a 15-year-old student who hates being clumsy. She wants to make her page in high school, but it's a mess, though, and yet Himari will do anything to get close to the person she admires. Even if it's getting into a totally unknown world... A story where little by little our main character will grow to reach her goal.

Rambunctious high school student Hayate is the lone girl in an all-boys soccer club. One day, honors student Yuuto suddenly asks her out, starting a cute opposites-attract romance.