TV-Series
Description
Aoki Masaru is a professional lightweight boxer and a core member of the Kamogawa Boxing Gym, standing 171 centimeters tall and fighting from an orthodox stance. His journey into boxing began not with a dream of championships, but with a grudge. As a high school delinquent, he and his best friend, Tatsuya Kimura, spent their days brawling with rival schools until they encountered Mamoru Takamura. After Takamura easily defeated them both, Aoki became obsessed with landing a single clean punch on him, a goal that led the pair to join the Kamogawa Gym. While their initial plan for revenge failed, the two discovered a genuine passion for the sport and continued their careers as professional boxers, with Takamura transforming from a target into a respected, if insufferable, senior figure.

In nearly every aspect, Aoki serves as the comedic heart of his gym. He possesses a playful, mischievous, and sometimes immature personality, often finding himself as the primary victim of Takamura's elaborate pranks. His role as comic relief is further accentuated by a series of running gags, including his peculiar romantic preference for women whom others consider unattractive, a trait that is said to have originated from being cruelly dumped by a beautiful girl in his youth. Despite his goofy demeanor, he maintains a stable, long-term relationship with his girlfriend, Tomiko, and works as a chef at a ramen restaurant called Chuuka Soba, where his culinary skills are noted to far exceed his boxing abilities.

Aoki is acutely aware that he lacks the natural talent of gym mates like Ippo or Takamura, a realization that fuels both his jealousy and his determination. Because he cannot rely on overwhelming power or genius instincts, he has developed a creative and unorthodox fighting style as an in-fighter, specializing in deceptive tactics and self-invented techniques designed to confuse and ridicule opponents. His most famous creation is the Frog Punch, a leaping strike he developed after learning from a loss. Another notable technique is the Look Away, where he turns his head to stare at something in the distance, relying on the opponent's instinctive reaction to follow his gaze, thereby creating an opening for an attack. He is also known for a risky strategy of playing dead to drain an opponent's stamina. Despite his cleverness, Aoki has a significant physical weakness: a glass jaw that makes him highly susceptible to knockout punches, a flaw he tries to compensate for with his tricky maneuvers.

The defining moment of Aoki's story in Hajime no Ippo Rising is his challenge for the Japanese Lightweight Championship against champion Katsutaka Imae. Imae initially looks down on Aoki as a half-hearted clown who mocks the sport with his flashy moves, viewing his own complete devotion to boxing, which included abandoning his girlfriend, as the only true path to strength. Aoki, however, enters the fight driven by a need to prove that he is just as committed, and that having a source of support outside the ring is not a weakness but a strength. The match becomes a grueling battle of attrition where Aoki successfully uses his unorthodox techniques to bring the champion to his limit. The fight ultimately ends in a draw, preventing Aoki from capturing the belt. Despite the disappointing outcome, the battle forces Imae to acknowledge Aoki as a true boxer and reconciles with his own girlfriend, demonstrating that Aoki's perseverance and different values had a profound impact.

Through his struggles and failures, Aoki is defined by his resilience. Even when feeling left behind by the success of his friends or facing the physical limits of his own talent, he refuses to give up on the sport he loves. His relationship with Kimura is his anchor; the two are an inseparable duo often referred to as Aokimura, and their shared history of delinquency and mutual support highlights their deep bond. While he may never become a world champion, Aoki Masaru's legacy is that of a hardworking showman who uses creativity, humor, and an indomitable will to compete, proving that there is more than one way to be a fighter.