Nobuyo Yamashita (山下 羨代, Yamashita Nobuyo; née Ōyama, October 16, 1933 – September 29, 2024), known professionally as Nobuyo Ōyama (大山 のぶ代, Ōyama Nobuyo), was a Japanese actress last affiliated with Actors Seven. Her husband was actor and television personality Keisuke Sagawa. She is best known for voicing Doraemon, the titular character of the Doraemon franchise from 1979 to 2005 and Monokuma, the main antagonist of the Danganronpa franchise from 2010 to 2016.
Source: “Nobuyo Ōyama”, English Wikipedia (CC BY-SA 4.0), excerpt