Toshio Asakura is Minami Asakura's father and owns the Minami Kaze coffee shop, meaning "South Wind" or "Southern Wind." He became a widower when his wife died while Minami was very young, an event that profoundly shaped his life. He remains steadfastly faithful to her memory and shows no interest in remarrying. Despite his loss, he maintains an upbeat and positive demeanor, often looking forward to Minami eventually marrying Kazuya Uesugi, reflecting his expectations for their future. Minami assists with household chores and helps at the coffee shop, indicating their shared responsibility in managing home and business after his wife's passing.

For a period, he employs Tatsuya Uesugi part-time at the coffee shop, observing and acknowledging Tatsuya's capabilities as a diligent worker. This practical interaction reveals his perceptiveness regarding the twins' characters beyond neighborhood reputations. His role remains consistent as a supportive but background figure in Minami's life, emphasizing familial stability rather than direct involvement in the baseball-centric narratives. In "Touch 3: Don't Pass Me By," his character retains the established traits from earlier series continuity without undergoing evolution or gaining additional depth, as the film focuses on Eijiro Kashiwaba's impact on the Meisei baseball team and Tatsuya's athletic challenges, incorporating no subplots or scenes involving Minami's family dynamics or the coffee shop.