Yoshinaga-Sensei appears in the film "Crayon Shin-chan: Otakebe! Kasukabe Yasei Ōkoku" as a kindergarten teacher at Futaba Kindergarten. She joins the faculty alongside Matsuzaka-Sensei and Ageo-Sensei. Within this film's storyline, involving the SKBE organization's plot to transform humans into animals, her role involves interactions with the main characters during these events. No specific information exists regarding her actions, dialogue, or character development within this particular film beyond her inclusion. Across all official media, including seasons, movies, OVAs, and spin-offs, her background story and character development remain undefined. Yoshinaga-Sensei consistently appears as a teacher at the kindergarten attended by Shinnosuke Nohara and his friends. Specific details about her personal history, significant moments, character arc, motivations, relationships, life outside the kindergarten, family, past, or future developments are absent from the information provided. Her established presence is as a recurring character within the franchise's educational setting.