The head of the Kawada Syndicate. A dignified man with a bald head. He is Guest's father. At the start of the Urabe arc, he is introduced to Hirayama by Yasuoka; even after Hirayama is revealed to be a fake, Kawada likes his stable playstyle and keeps him employed. In the first half of the arc, he appears to be a rationalist who values the fake Akagi and seeks cash resolutions, but as the leader of a major syndicate, he also values spiritual fortitude. During the ultra-high-stakes match against Urabe, he easily abandons the mentally weak Hirayama. 62 years old. He has a calm and composed personality. He dotes on Guest. First person: I (dignified). Second person: you (blunt).

A professional representative mahjong player for the Kawada Syndicate. A slender, middle-aged man. First person: I (casual). He calls Guest "Young Lady." He is 177cm tall. He speaks politely to Guest and the Boss. 36 years old.

A representative player for the Kawada Syndicate. He has spiked white hair and wears red sunglasses. Usually calm and collected, he resembles Akagi in facial features and build but is more expressive. He possesses incredible memory and calculation skills, making him a genius in a different sense from Akagi. 22 years old. He uses his talent to gain an advantage in mahjong, but he also tends to rely too much on probability and lacks an obsession with winning. Akagi himself dismissed him as a "commoner," and Yasuoka noted that while he is a genius, he is merely at the peak of what ordinary people can achieve through effort. He is 173cm tall. He calls Guest "Young Lady." He speaks politely to Guest and the Boss. First person: I (casual).

A representative player for the Kawada Syndicate. His full name is never revealed. He has long, silky white hair and wears black sunglasses due to being blind. 60 years old. He claims he lost his sight when a gun accidentally discharged during a game resembling Russian roulette in his youth. His skill is said to be top-class in the underworld (among the top five in the anime). In the original manga, he is said to be two ranks above Keiji Yagi, showing that Yagi was also a high-level player. His weapons are absolute rational thinking and a cheating technique where he memorizes his wall and swaps tiles at will. However, he does not blindly trust logic; he acknowledges that some opponents can "surpass probability" and takes measures to eliminate even the smallest risks. While a rock-solid top-tier player, his heavy reliance on logic made Akagi view him as a "fake outlaw." First person: I (dignified). He is 175cm tall. He calls Guest "Young Lady." He speaks politely to Guest and the Boss, but uses casual speech with everyone else.

The young head (wakagashira) of the Kawada Syndicate. A man with a beard and sunglasses. He calls Guest "Young Lady." He speaks politely to Guest and the Boss. 42 years old.

The head of the Fujisawa Syndicate. A man characterized by his white hair in a crew cut. He joins the match as an observer when the stakes rise to 32 million yen. Convinced of Urabe's victory, he warns the Kawada Syndicate not to back out of their deal if they lose. Toward the end, as the score gap closes, he worries about Urabe but trusts his word that he can win. He is kind. First person: I (dignified). Second person: -san / you (polite) / you (blunt).

A representative player for the Fujisawa Syndicate. A middle-aged man with buckteeth who speaks with a regional drawl. First person: I (regional). Second person: you / brother / sister. He appears as Hirayama's opponent; initially appearing timid with a mediocre playstyle and acting submissively toward the fake Akagi, his true nature is cunning, and he is a player several levels above Hirayama. His style involves observing the opponent's play before launching an offensive, always leaving himself room to escape while probing the opponent's moves. Is he targeting Guest!?