Daigen Nōma is a supporting antagonist in the 1996 Japanese film Fudoh: The New Generation, portrayed by actor Riki Takeuchi. He is established as the legendary and powerful boss of the Yasha-Gumi, a major criminal organization from Osaka. His reputation within the underworld is such that his involvement signals a significant escalation of any conflict.

Nōma's role in the story is triggered by the escalating chaos in the Kyushu underworld. As the teenage protagonist, Riki Fudoh, launches a bloody campaign of assassinations against the region's top crime figures, the surviving criminals are thrown into a state of panic. It is at this point that Daigen Nōma is alerted to the situation, demonstrating his high status as the figure the underworld turns to in a crisis. In response, he contacts Riki’s father, Iwao Fudoh, indicating that Nōma holds a position of authority or influence over him and the local yakuza.

His most significant and defining moment occurs at the film's climax. After Riki successfully kills his father, Iwao, to avenge his murdered brother, the narrative moves to the funeral. It is here that Riki comes face to face with Daigen Nōma, the one major enemy who managed to survive the earlier assassination attempts. In a final standoff that encapsulates the film's violent and stylized tone, Nōma and Riki exchange words before drawing their weapons simultaneously, with Nōma pulling out a gun as Riki unsheathes his katana. The film ends on this moment, leaving their duel unresolved but cementing Nōma as the ultimate, untouchable adversary and the final obstacle in Riki’s path to power. No further details regarding his personality, background, motivations, or specific abilities are presented in the source material.