Yuka Kurumatani, a retired professional basketball player who competed for Japan’s National Team, built a life with Tomohisa, a Nagano Prefecture farmer, and raised their son, Sora. Her mother, Yone, ran a Kawasaki barbershop. After a critical illness diagnosis, Yuka transferred to Kanagawa National Hospital under the care of Sumi, elder sister of Madoka Yabuuchi. Despite her deteriorating health, she sustained an optimistic spirit, mentoring young athletes like Sora and Yozan Kamiki, championing the belief that physical height should not dictate basketball success.

Throughout Sora’s youth, Yuka trained him in adaptive strategies such as the two-handed shot, framing his stature as a unique asset. She prioritized teamwork and persistence, urging him to concentrate on effort over outcome. Beyond her son, she organized basketball clinics to dismantle societal biases about athletes’ size. Her final public moment came at Kuzuryū High’s Inter-High Preliminaries, where her visible frailty foreshadowed her rapid decline. She passed soon after, her funeral gathering family, colleagues, and friends like Sakamaki.

Though Yuka’s illness was never named, a halted surgical procedure implied a terminal condition, possibly cancer. Her legacy persisted posthumously through flashbacks and the enduring impact of her coaching. Yozan, whom she trained before her hospitalization, carried her teachings forward. Tensions with Sora emerged when he secretly relocated to Kawasaki, but reconciliation followed Yone’s accidental revelation during a hospital visit. Yuka’s journey underscored resilience and mentorship, her basketball philosophy—rooted in inclusivity and tenacity—shaping Sora’s dedication and inspiring broader change in the sport’s culture.