Nobuyo Ōyama (大山 のぶ代, Ōyama Nobuyo?, born on October 16, 1933 in Shibuya, Tokyo) is a Japanese voice actress currently represented by Actors Seven. Her real name is Nobuyo Yamashita (山下 羨代, Yamashita Nobuyo?); Yamashita is her husband's surname.
She is best known for playing the title character in the long-running Doraemon anime.
It was revealed on May 13, 2015 that Ōyama was suffering from dementia, putting any future work on hold.