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Asuka Ōkura, born September 5, 1996, is a Japanese singer and musician known by the stage name Asca. She is signed to Sony Music and Sacra Music. She debuted in 2013 after becoming a finalist at the 5th Animax All-Japan Anisong Grand Prix. After focusing on her studies, she resumed her music career in late 2016. Her songs have been featured in anime series including Sword Art Online, Fate/Apocrypha, Darwin's Game, Edens Zero, and The Irregular at Magic High School.