Tōji Kanzaki stands tall with short brown hair, dark brown eyes marked by small irises, and a perpetually relaxed smirk. He sports casual work attire at his family’s Kanzaki Cycle Shop, frequently with a toothpick between his lips, and a dark brace encasing his left knee—a constant feature since his high school days as a sprinter at Sohoku High.

Once captain of Sohoku’s bicycle racing club in his third year, his athletic trajectory shifted after an enduring knee injury, leading him to oversee the family business. His legacy persists through Jin Tadokoro, who embodies facets of his competitive spirit. Tōji’s younger sister, Miki Kanzaki, mirrors his dedication to cycling as Sohoku’s team manager, four years his junior.

Observant and levelheaded, Tōji dispenses pragmatic advice rooted in experience, his mechanical expertise and tactical knowledge evident in shop repairs and cycling guidance. The knee brace and Tadokoro’s adoption of his "will" hint at a career cut short, yet his mentorship and family ties keep him entwined with the sport.

Flashbacks, including those in *Spare Bike*, depict his high school self with the same brace and piercing gaze. Though no longer racing, his interactions and insights underscore a lasting imprint on Sohoku’s cycling culture, bridging past prowess with present influence.