Nobuyo Ooyama, born Nobuyo Yamashita (山下羨代) was a Japanese retired actress, voice actress, singer, screenwriter, essayist, and TV personality affiliated with Actors Seven. Her husband is late TV personality Keisuke Sagawa. She is best known for voicing the title character in the Doraemon anime series that ran from 1979 to 2005, for 26 years. She also voiced Monokuma, the main villain from the Danganronpa video-game series, from 2010 to 2016 for the first three video games, two Danganronpa stageshows, and Danganronpa: The Animation.