Sohei Dojima (堂島 宗兵, Dōjima Sōhei)
- Voiced by: Hisao Egawa
- Portrayed by: Harumi Sone (Like a Dragon: Prologue)
The cunning but violent head of the Dojima Family. Dojima was known for getting his way by any means necessary. Daigo's father, and Yayoi's husband. His death caused discord among the men of his family, and forced them to choose a new oyabun to follow. Nishikiyama was responsible for his death, but Kiryu took the blame.
It is revealed in a flashback during the second game by Kashiwagi that he was behind the Jingweon mafia massacre, ordering his lieutenants Shintaro Kazama and Futoshi Shimano to kill all 46 members of the mafia.
Yayoi Dojima (堂島 弥生, Dōjima Yayoi)
- Voiced by: Orine Fukushima
Sohei Dojima's wife and later widow. She sets up an ambush for Kiryu believing him to be responsible for her husband's death, but after he defeats the ambush and stands face to face with her, Yayoi then realizes that Kiryu in fact took the blame for another (not knowing it was Nishiki) and lets him go.
By the second game, she has taken interim chairmanship of the Tojo Clan. She asks Kiryu to negotiate with the leader of the Omi alliance. Later she is taken prisoner by Koji Shindo, the Second Chairman of the Nishikiyama family who wants to take her as his lover, but defies him and is saved by Kiryu.
Daigo Dojima (堂島 大吾, Dōjima Daigo)
- Voiced by: Satoshi Tokushige
Sohei's son. He holds a deep respect for Kiryu, and accompanies him to Kansai to settle a score with Ryuji Goda, the chairman of the Go-Ryu clan and the man who sent him to prison 5 years ago as part of a set-up. He is kidnapped, but eventually recovered. He then takes on a leadership role and brings the fragments of the Tojo Clan together, to lead them into Kamurocho to stop the Jingweon mafia from destroying the city.
Prior to the third game, Daigo becomes the 6th Chairman of the Tojo Clan. He is shot by a man who is the spitting image of Shintaro Kazama. His fate is left uncertain until Kashiwagi reveals that he has stashed him in a hospital to recover, but has not told anyone of Daigo's whereabouts. Mine eventually finds his way to the hospital (as does Kiryu), and Mine prepares to kill Daigo out of compassion as he holds too deep a respect to see him living off machines. Daigo awakens after Mine's defeat and saves the two from Richardson momentarily.
During Yakuza 4, Daigo made an emergency meeting with the Ueno Seiwa Clan following Ihara's death. Isao Katsuragi, lieutenant of the Ueno Seiwa, demanded Daigo that, to make up for Ihara's murder, the life of Arai or control of the business Majima runs, but Daigo refused but was then asked by Katsuragi to use Majima instead since he is the "only one to measure up Ihara's murder. Katsuragi then leaves and tells Daigo to decide what he should do. It was later revealed by Majima that he told Kazuma that Daigo set him up by giving him away to the police. Later Daigo is fought and defeated by Kiryu on top of the millennium tower.