TV-Series
Description
Katsunori Harasawa is the head coach of the basketball team at Tōō Academy. He is a middle-aged man typically seen dressed in formal attire, including a striped shirt, tie, and occasionally a waistcoat. He has black, slightly curly hair that reaches his lower neck and is parted to one side. Although his exact age is not specified in the main narrative, he is known for having a youthful appearance that sometimes sparks a sense of rivalry in other coaches.

Before his career as a coach, Harasawa was a player of considerable skill. He was a former member of the Japanese national basketball team, where he played alongside several other coaches who appear in the series, including Kagetora Aida, Genta Takeuchi, Masaaki Nakatani, and Eiji Shirogane. It was during this time that he became an old acquaintance of Kagetora, who affectionately refers to him by the nickname Katt-chan. Harasawa also works as a chemistry teacher at Tōō Academy.

As a coach, Harasawa has a calm, sharp, and analytical personality. He is a keen strategist who values victory and structures his team's play to maximize their chances of winning. He is particularly known for building his game plan around the immense individual talents of his ace player, Daiki Aomine, demonstrating his pragmatic approach to utilizing the strengths of his roster. He also places great trust in the analytical abilities of his team manager, Satsuki Momoi, frequently relying on her data to confirm opposing teams' patterns. A minor but distinctive personal habit is his tendency to fidget and play with his hair, often while deep in thought during matches.

Harasawa's primary role in the story is as a supporting figure connected to Tōō Academy, serving as the main opposition in key matches against Seirin High. His most significant relationships within the series are with other members of the coaching fraternity. He shares a warm, long-standing friendship with Kagetora Aida, who is the father of Seirin's coach, Riko Aida. He also has a notable dynamic with Genta Takeuchi, the coach of Kaijō High, who views Harasawa as a rival, particularly concerning his youthful looks. Another consistent aspect of his personal life is his apparent interest in Masako Araki, the coach of Yōsen High, whom he frequently invites to meals, though his advances do not appear to be reciprocated.

Throughout the series, Harasawa does not undergo significant personal development, but his past is briefly explored to establish his connections with other coaches. He remains a consistent figure representing the disciplined and strategic mindset of a championship-level high school coach. Regarding his abilities and personal life, it is noted that his favorite hobby is playing golf, and he enjoys making cocktails and drinking whisky. He is single and is known to have a peculiar and problematic behavior when intoxicated, a side of him that he prefers to keep private from his players. In his youth, his signature basketball move was the fadeaway shot.