About Nobuyo Ōyama
Nobuyo Yamashita, known professionally as Nobuyo Ōyama, was a Japanese actress, voice actress, screenwriter, singer, essayist, and television personality last affiliated with Actors Seven. Her husband was the actor and television personality Keisuke Sagawa. She is best known for voicing the title character in the Doraemon television anime series that ran from 1979 to 2005 and Monokuma, the main villain of the Danganronpa franchise for the first three video games, two Danganronpa stageshows, and the television adaptation Danganronpa: The Animation from 2010 to 2016. In 1980, sales of Doraemon-related records performed by Ōyama, including the EP Doraemon Ondo, exceeded over one million copies, which earned her an awarded Gold Disc from Nippon Columbia. You should join a club that allows you to use your voice." Ōyama became satisfied with her voice over time, and was able to overcome her complex.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.