Tamao Kataoka is Nobita's uncle on his mom's side—he's married to Nobita's mom's side of the family, making him Nobisuke's brother-in-law. He's also got an older sister, Tamako Kataoka.
Fun fact for manga readers: his name in the original manga is actually Tamaotto, not Tamao.
Content compiled by AnimeList.moe from publicly available sources.
