Shinji Date, a second-year Noukin High School student, previously pitched in baseball before retiring due to an injury hindering his precision. Seeking new high school activities, an invitation from Kyouhei Misumi drew him into the kabaddi club. By the series' events, he has accrued roughly six months of kabaddi experience.

Standing 1.74 meters tall and weighing 80 kilograms, Shinji possesses a muscular build from dedicated daily workouts boosting muscle mass and strength. This regimen compensates for past athletic limitations and bolsters his kabaddi performance. He has spiky black hair and no visible pupils, wearing the number 4 red uniform for Noukin's kabaddi team.

Frank and observant, initial portrayals note Shinji's occasional clumsiness, counterbalanced by his physical gifts. Teammate interactions and kabaddi involvement fuel his development into a more confident, assertive figure, shedding reserve to actively engage in team strategies.

Within Noukin's kabaddi defense, Shinji deploys his raw power, forming chains with teammates or restraining opponents. His pitching background informs his grasp of teamwork and precision, adapted to kabaddi tactics. Training under former Japanese national captain Eiji Kuno further hones his defensive skills, aligning with the team's strategic focus on formidable defense.

Key narrative arcs feature Shinji in a practice match against Souwa High and a pivotal Kanto Tournament match versus Oyama Ritsushin High. Facing players from his past during the latter match fortifies his resolve and deepens team integration. His perseverance and physical prowess earn recognition, placing him among the series' notable players.

Shinji's journey embodies adaptation and perseverance, transitioning from baseball retirement to finding renewed purpose in kabaddi. Relationships with teammates, particularly Misumi and others at Noukin High, cement his role as a dedicated and evolving competitor.