Kenzaburō Daiku is a second-year student at Tokisadame High School and the president of the igo-soccer club. As the heir to the immense wealth of the Daiku Corporation, his lifestyle reflects his privilege, featuring a lavish 1,700 square foot bathroom in his garden and a tendency to solve minor issues with money, like buying school banners. Despite this background, he exhibits a relaxed and friendly nature, differing from other affluent peers. He possesses light chestnut-brown, messy hair and distinctive eyes drawn as slim ovals encircled by nearly complete circles. His typical outfit is a short-sleeved white shirt with a lightly open collar and long pants. The igo-soccer club faced dissolution when membership fell to just Daiku and Yuria Sekiguchi after Ogi quit, violating the school's three-member minimum rule. Daiku resolved this crisis through unspecified means, later recruiting Makoto Sakurai, who joined unaware of the club's tenuous status. Daiku initially founded the club casually for recreation, spending time playing games with Sekiguchi. His perspective changed when Sakurai revealed igo-soccer was a recognized sport and demonstrated its rules, surprising Daiku. Daiku shares a close friendship with fellow club member Yuria Sekiguchi, who harbors a crush on him. He remains largely oblivious to her feelings throughout the series, though implications suggest possible realization later. Even after recruiting more members, Daiku continues non-igo-soccer games with Sekiguchi during club time. His relationship with his younger sister, Sumika, is inferred through their shared wealthy background and her comment about her brother's interest in "a sport where people die," referencing igo-soccer. His appearances across media depict club challenges and casual interactions. Episode 8 focuses on the membership crisis. Episode 11 features segments titled "Daiku Power" and "Money," highlighting his wealth and problem-solving approach. Episodes 14, 19, 23, and 26 show his participation in club activities and school life. Manga volumes 2 through 11 include his involvement, from club management in chapters like 58 and 83 to everyday scenarios in shorts and cover art. The Himekuri CD series and Nichijou Encyclopaedia also contain entries about him. Trivia notes his original name was Wakazawa Nobuaki in early drafts. His surname "Daiku" means "carpenter," while his given name combines "healthy, strong" (健), "three" (三), and "son" (郎). Unlike many characters, he is not named after a Gunma Prefecture location.