Osaka or Ōsaka is a Japanese surname that may refer to
, Japanese writer , Japanese animator, character designer and illustrator Mari Osaka (born 1996), Japanese tennis player, sister of Naomi , Japanese Communist , Japanese pastor, theologian and newspaper columnist Naomi Osaka (born 1997), Japanese tennis player, sister of Mari , Japanese manga artist , Japanese voice actor and radio personality
Fictional characters Naru Osaka, character from Sailor Moon , a character from the media project Love Live! Nijigasaki High School Idol Club