Yoshio Minamoto is Shizuka Minamoto's father and Michiko Minamoto's husband. His most prominent narrative role occurs in future timelines, specifically within the short film "Doraemon: Nobita's the Night Before a Wedding" and the film "Stand by Me Doraemon," where he discusses Shizuka's decision to marry Nobita Nobi. Yoshio's physical appearance varies significantly across adaptations. The 1973 anime depicts him as a tall, medium-skinned man with traditional features. The 1979 anime portrays him as very thin and tall. Conversely, the 2005 anime and some manga chapters present a fluffy and chubby Yoshio, occasionally resembling Nobita's teacher in design. Within "Stand by Me Doraemon," Yoshio accepts Nobita as Shizuka's future spouse after Nobita rescues Shizuka during a critical mountain blizzard; this approval directly leads to their future marriage. He later attends Shizuka and Nobita's wedding ceremony in "Stand by Me Doraemon 2." His familial relationships center on being Shizuka's father, with indications that Shizuka prefers him over her mother. Yoshio actively supports Shizuka's life decisions, explicitly endorsing her choice to marry Nobita. His extended family includes a nephew named Kazu. The name "Yoshio" combines "righteous" (義, *yoshi*) and "hero, manly" (雄, *o*). The surname "Minamoto" means "source" or "origin" (源), referencing a historically prominent Japanese clan.