Ichiro Mizusawa

Ichiro is passionate about basketball and deeply admires Rukawa. His ambition is unusually specific: he wants to follow his senior to Shohoku and play alongside him on a team capable of winning the national championship. That goal has shaped both his training and his plans for high school.

He is proud of his ability and struggles intensely when circumstances threaten to separate him from the sport. Basketball is not simply an extracurricular activity for Ichiro; it is bound to his imagined future, his admiration for Rukawa, and the identity he has built as Tomigaoka's captain.

His interactions with Shohoku reveal a strong competitive instinct. He does not merely want sympathy or ceremonial participation. When given an opportunity to play, he wants genuine basketball, which helps explain why Rukawa's uncompromising attitude toward him ultimately carries more meaning than obvious pity would.

Ichiro is an unusually talented middle-school basketball player. He succeeds Rukawa's generation at Tomigaoka and becomes captain of its basketball team, indicating both ability and leadership. Toei's official synopsis describes him as an exceptionally gifted player whose ambition is to pursue the national title alongside Rukawa.

He plays power forward and wears number 4. During his opportunity to play with Shohoku, his movement is good enough to impress experienced high-school players; Mitsui remarks on ability that exceeds what he expects from a middle-school player.

Ichiro's approach also demonstrates competitive courage. Rukawa does not indulge him with easy play, forcing Ichiro to experience the intensity he admires rather than a softened imitation of it.

Ichiro's story is exclusive to the fourth original Slam Dunk anime film. His older sister Akane Mizusawa, a friend of Haruko Akagi, approaches Haruko about fulfilling her brother's wish to play with Rukawa. Toei places the story while Shohoku is preparing for its decisive match against Ryonan.

Ichiro has been diagnosed with articular tuberculosis affecting his right leg, threatening to end his playing career and destroying his plan to join Rukawa at Shohoku. His final request is to share a court with the senior he admires, prompting Coach Anzai to arrange an intra-squad game involving him.

Ichiro initially hopes to play on Rukawa's side. Instead, the two ultimately face one another, and Rukawa refuses to patronize his junior by playing halfheartedly. The game allows Ichiro to confront the possible end of his playing career through serious competition rather than pity.

Afterward, Rukawa gives Ichiro his number 11 Shohoku jersey. Ayako also suggests another way for him to remain involved with basketball by following her path as a team manager. Because Ichiro is a film-original character, these developments do not occur in the original manga continuity.

Kaede Rukawa is Ichiro's former Tomigaoka senior and basketball idol. Ichiro's plan is to follow him to Shohoku and pursue the national championship beside him. Rukawa's decision to play seriously against Ichiro rather than treat him delicately becomes his distinctive way of acknowledging his junior as a basketball player.

Akane Mizusawa is Ichiro's older sister. Concerned about her brother, she approaches Haruko Akagi in an effort to arrange the opportunity he desperately wants.

Haruko Akagi acts as the connection between the Mizusawa family and Shohoku, carrying the request to the basketball team.

Mitsuyoshi Anzai ultimately permits the special intra-squad game that gives Ichiro an opportunity to play with Shohoku.

Hisashi Mitsui plays alongside Ichiro during the scrimmage and recognizes that the younger player's movement is unusually advanced for a middle-school athlete.

Hanamichi Sakuragi participates in the game and responds to Ichiro in his characteristically forceful way, treating the occasion as real competition rather than merely a sentimental exercise.

Ayako shares Ichiro's Tomigaoka background. After his final game, she suggests that he could remain connected to basketball as a future manager, offering him a path forward even if playing is no longer possible.