Morita Tetsuo's life changes when he meets Hirai Ginji, who works in the unknown and mysterious 'back world' of society full of villains.

Japan, 1995. After graduating from high school, Itō Kaiji moves to Tokyo to get a job, but he fails to find steady employment because the country is mired in its first recession since World War II. Depressed, he festers in his apartment, biding the time with cheap pranks, gambles, liquor and cigarettes. Kaiji is always thinking about money and his perpetual poverty frequently brings him to tears.

Kaiji's unrelenting misery continues for two years until he is paid an unexpected visit from a man named Endō, who wants to collect an outstanding debt owed to him in Kaiji's name. Endō gives Kaiji two options - either spend ten years to repay this outstanding debt, or board the gambling ship Espoir ("hope" in French) for one night to clear the debt. Using a con, Endō pressures Kaiji into accepting the deal, believing he will never come back from the voyage.
--Wikipedia

The manga is divided into three parts:
Part 1: Volume 1-13 (Complete)
Part 2: Volume 14-26 (Complete)
Part 3: Volume 27-39 (Complete)
Part 4: Volume 40-? (Ongoing)

A direct sequel to Tobaku Datenroku Kaiji, picking up immediately after Part 3 ends. After his tremendous victory in 2-Player Mahjong against the villainous President, Muraoka Takashi, Kaiji is being driven home by Kazuya, the son of Chairman Hyoudou. However, in the car, Kazuya asks Kaiji if he would be interested in one more gamble that night, and Kaiji accepts. What surprises lie in store for our dear Kaiji, and what will the gamble be?!

Katagiri Yuuji is a divorced, single, lazy gambling addict whose only real activity is playing Pachinko. He does it well enough to get by, but his life is more or less empty... until a young girl named Miura Satomi appears, who is a big fan of his. A classic story by Fukumoto about Pachinko, attraction, and the thrill of gambling.
(Source: MU)

No matter how much time passes, and no matter who they are, the love one has for their parents does not change. A heartbreaking tragedy about the memories a son has of his late father.

After awakening from an eight-year-long coma, Kurosawa must face the trials of homelessness.

While mahjong is a game that is often played with family and friends, it is also a game that is played in the darkest corners of society. Nangou is a compulsive gambler who has accumulated debt over three million yen. In a last ditch attempt to clear his record, he decides to wager his life on a game of mahjong with the mafia. Unfortunately, as the game progresses, Nangou only moves further from the prize and closer to death.
When all hope seems lost, the game parlor is suddenly intruded upon by Shigeru Akagi, a young boy on the run from the police. Desperate to turn the game around, Nangou hands the game over to Akagi after teaching him a few of the rules. The mafia can only smirk as Akagi sits down to play. However, they soon come to learn that Akagi is a natural born gambler. An imposing figure who does not fear death. One who is destined to become a legend.
[Written by MAL Rewrite]

One incredibly tough kid tries to clear his name. He’s no murderer, and he’ll do whatever it takes to prove it…

A collection of short mahjong-centric stories by Fukumoto Nobuyuki.

Itou Kaiji, now free of debt but without a penny is leeching himself in Mr.Sakazaki's new house, despite all the flirtings (extreme torment for Kaiji) from Sakazaki's daughter, Mikoko. Sakazaki attempts to kick Kaiji out, even by offering a farewell 'we never knew each other' money of 3000000 yen. While Kaiji ponders himself on the decision, he is visited by Miyoshi and Maeda, two of his 'allies' he had saved from the last part of the series.

Watanabe Yuuichi, also known as Pen-chan, loves mahjong. It's just too bad that he's not very good at it. Follow Pen-chan's wins and losses (mostly losses) in a series of short tales about his friends, family, co-workers, and local yakuza until the final conclusion where Pen-chan makes the biggest gamble of his life...

Takafumi Ten is called to a mahjong club one night to play again Ikawa Hiroyuki, a young mahjong player. Having just robbed Ten's friends blind at mahjong, Ten arrives to take back his winnings.. Ten's mahjong style becomes more apparent as the game progresses...amateurish! Ten cheats in the last round, using a move called the Tsubame Gaeshi, and winning with a Tenhou hand. Hiroyuki is angered once Ten admits he cheated after the game. Will he come to understand Ten's "Way of Tenhou", where Ten willingly cheats and gets beat up in response for his friends? Will Ten unlock his true mahjong potential or cheat forever?

Set in 2002, 3 years after the death of Akagi Shigeru, this sequel to Ten - Tenna Toori no Kaidanji chronicles Hiroyuki's quest to follow the late Akagi's advice and live life freely even if it means complete failure.

This is part 2 of Gambling Emperor Legend Zero, picking up a few years after the cliffhanger ending of part 1.

Tenma is a Middle Schooler who loves playing Mahjong. He doesn't know exactly why, but the freedom it brings him fills his chest with pride. One day, his friends run into some trouble with University Students from Kantou, and it's up to Tenma to save the day!

Ukai Zero saves three troubled teens from a Suicide Website, and together chooses to work as 'Robin Hoods' of society. However, one of Zero's friends are caught by an organization he got in trouble with, and Zero is forced to enter a gambling competition hosted by a rich, rotten old man who is looking for talented gamblers to be his rep player. The reward money? ONE TRILLION YEN.
Resumed serialization as Tobaku Haouden Zero Gyanki-Hen on 7/13/2011 after a 2.5 year hiatus.

In the aftermath of the disclosure game that won two Mahjong anomalies, the villainy "17 steps" game. Kazuya sets forth a gamble of 1,200,000,000! How will Kaiji survive?!

The continuation of the Kaiji series, picking up immediately after the end of One Poker Hen.

Spoiler (mouse over to view)One Poker has been concluded, with Kaiji emerging as the victor and claiming the 2.4 Billion Yen as a prize! But now, a new problem arises... how can the Asian Trio take it with them with Kazuya's Black Suits gathered right outside the entrance of the warehouse?!

The 6th part of the Kaiji series.

1. Tobaku Mokushiroku Kaiji

2. Tobaku Hakairoku Kaiji

3. Tobaku Datenroku Kaiji

4. Tobaku Datenroku Kaiji - Kazuya Hen

5. Tobaku Datenroku Kaiji - One Poker Hen

6. Tobaku Datenroku Kaiji - 24oku Dasshutsu Hen