Similar to the plot of the original
Yakuza, the game centers around yakuza lieutenant
Kazuma Kiryu (
Takaya Kuroda), who takes the blame up for the murder of his patriarch Sohei Dojima, committed by his sworn brother and best friend Akira Nishikiyama (Kazuhiro Nakaya), spending ten years in prison before being granted
parole. A free man, Kiryu discovers that Nishikiyama is now a powerful but cold-hearted yakuza boss, his childhood friend and girlfriend Yumi Sawamura (
Maaya Sakamoto) has gone missing, and everyone is searching for ten billion yen that was stolen from his former organization, the Tojo Clan. As war erupts throughout the streets of Kamurocho between many different factions (including government agents and the
Triad), Kiryu decides to find Yumi and the missing money, and protect Haruka (
Rie Kugimiya), a mysterious young girl whom everyone seems to be after. Eventually, a remorseful Nishikiyama sacrifices himself to kill Haruka's father, Kyohei Jingu (Hiroaki Yoshida), who was a corrupt politician bent on destroying the Tojo and his loved ones, while Yumi died in Kiryu's arms from a gunshot wound. Rather than give in to despair and allow himself to be arrested, Kiryu leaves the Tojo and becomes Haruka's adoptive father.
Kiwami's story also introduces two new plot lines focused on Nishikiyama and Goro Majima (
Hidenari Ugaki), a ruthless Tojo captain and Kiryu's rival. Nishikiyama's story is told in flashbacks and focuses on his descent into madness. The day after Dojima's murder and Kiryu's arrest, the Dojima Family tries to figure out the culprit while mocking Nishikiyama for his ineptitude. In 1996, the Kazama Family decides to give Nishikiyama his own "family" to control, with the expectation that he would look out for Kiryu now that he had been expelled from the Tojo Clan. However, he proves to be an incompetent leader, with his family captain, Matsushige (Hitoshi Ikeda), who was hired because he was the top earner in the Kazama Family, disrespecting him and commanding more respect among his men. As Yuko, his terminally ill sister, requires a heart transplant, Nishikiyama visits a doctor, who tells him that he needs 30 million yen to pay for it. Nishikiyama tells Matsushige to get the money for him by any means, prompting him to shake down stores in the Kazama family territory. Osamu Kashiwagi (
Shunsuke Sakuya), the Kazama Family captain, violently disciplines Nishikiyama, then forgives him but tells him that Kiryu would be morally better as a leader. Nishikiyama is then fully convinced that the entire Kazama Family hates him after Futoshi Shimano (
Naomi Kusumi) accuses Kazama of deliberately giving Nishikiyama men he cannot control, and that Nishikiyama should learn to care for himself instead of Kiryu. Eventually, Nishikiyama learns from Matsushige that the doctor was a fraud who had already had the 30 million yen from the beginning. Nishikiyama rushes to confront him, but discovers that he has run away. Yuko dies, and Nishikiyama prepares to commit
seppuku, but is interrupted by Matsushige. Finally fed up with the disrespect and harassment, Nishikiyama stabs him and confesses to Dojima's murder before using the blood to slick back his hair, becoming the changed man Kiryu would encounter during the main story. Majima is reintroduced as a sadomasochistic yakuza who is at odds with Kiryu for not wanting to fight him. Despite this, Majima is fascinated by Kiryu's stoic strength and considers him to be the perfect opponent. When Kiryu is released from prison, Majima is disappointed by his combat skills going rusty and arranges a series of elaborate and bizarre scenarios to manipulate him into fighting and thus make him stronger. Despite the fights, Majima collaborates with Kiryu to defeat Dojima Family loyalists and even confesses to him that he does not care about avenging Shimano's death. Once Kiryu regains his combat abilities, Majima challenges him to one final fight, which he ultimately loses. However, Majima finds joy in fighting Kiryu and promises to keep challenging him for fun. ==Development==