Nobita's grandson is the unnamed son of Nobisuke and the grandson of Nobita and Shizuka. He is shown to be blond (although it's also as likely that his hair was bleached). He wears a violet v-neck suit with a white turtleneck and pink neck tie. Nobita's grandson is the grandfather of Sewashi, Nobita's great-great-grandson.
- It is suggested that either him or his father has at least two children as in volume 21, it is revealed Sewashi has a cousin who looks almost exactly like Shizuka.
- It is possible that blonde is not his natural hair color since none of Nobita's relatives are blond.