TV-Series
Description
Junpei Azuma is the older brother of the baseball prodigy Yuhei Azuma. In his own high school days, Junpei was a star pitcher and cleanup hitter of considerable promise, so highly regarded that he was being scouted by professional teams and was on the verge of leading his school to the national Koshien tournament. This path was cut short by a career-ending leg injury, which he sustained while saving his younger brother Yuhei from a fall down a staircase. The injury left him with a slight, permanent limp that does not, however, hinder his daily life or his fundamental baseball abilities. After his playing days ended, Junpei began working as a produce delivery truck driver.

In personality, Junpei is the energetic and optimistic foil to his younger brother. Where Yuhei is cool, reserved, and often burdened by a sense of guilt, Junpei is brash, loud, and unfailingly cheerful. He shows no visible regret or self-pity about his lost baseball future, and instead urges his brother to enjoy playing the game. He is a straightforward and persistent individual, particularly when it comes to matters of the heart, and he is prone to theatrical declarations. This side of him emerges prominently when he meets Ichiyo Tsukishima, the eldest daughter of the Tsukishima family, with whom he falls instantly and deeply in love. His courtship is clumsy and relentless, but it is driven by a genuine affection that eventually wins over not only Ichiyo but also her initially skeptical younger sisters.

Junpei's primary motivation is intrinsically tied to his family and his love of baseball. He carries the desire to see his brother Yuhei achieve the Koshien berth that was stolen from him, though he never pressures Yuhei with this burden. Later, his motivation crystallizes around a half-joking promise from Ichiyo: she agrees to marry him if the Seishu baseball team, with which both Azuma brothers are now involved, can reach Koshien. Junpei pursues this goal with tremendous, single-minded enthusiasm.

His role in the story expands significantly from that of a supportive older brother to an active participant in the team's journey. After the corrupt coach Daimon is fired, Junpei is brought on as the temporary, or assistant, batting coach for Seishu's baseball team. In this capacity, he brings a new, lively energy to practice and uses his own experience and high-level knowledge of the sport to drill the players, earning their respect. Junpei's arrival as a coach, alongside Aoba Tsukishima's pitching instruction, marks a turning point for the team, providing them with the dedicated and informed training they need to compete at a higher level.

His key relationships define his actions. With his brother Yuhei, Junpei is a source of unconditional support and a reminder to find joy in the game, helping to ease the guilt that has long weighed on the younger Azuma. With Ichiyo Tsukishima, he is a determined and comedic suitor whose persistence eventually yields a serious romantic relationship. He also forms a bond with the protagonist, Kou Kitamura, noting the young pitcher's resemblance to Aoba in both competitiveness and talent, and acting as a jovial but insightful mentor figure.

Junpei undergoes a quiet but significant development. He enters the story as a figure from a "what-could-have-been" past, a talented player whose career was cut short. Through his coaching role and his efforts to win Ichiyo, he transforms from a man living in the shadow of that loss into someone actively building a new future for himself, as a coach, a potential husband, and a man who has made peace with his past. His happy demeanor, which Yuhei initially suspects might be forced, becomes more genuinely integrated into his life.

Regarding his abilities, despite his physical limp, Junpei demonstrates that his baseball instincts and skills remain sharp. He possesses a high level of technical knowledge, particularly in hitting and batting practice. As a coach, he is a capable and effective knocker, able to hit fungos with precision and variety to challenge his fielders. He is also shown swinging a bat at a batting center with power, indicating that his swing and hand-eye coordination are still excellent.