Aska, Ryo Aska or Ryō Asuka (飛鳥 涼 Asuka Ryō) (born Shigeaki Miyazaki (宮﨑 重明 Miyazaki Shigeaki) on February 24, 1958, Ono, now part of Onojō, Fukuoka) is a Japanese singer-songwriter.
Aska is best known for work as part of the music duo Chage and Aska. As a composer, he wrote most of the principal hit songs for the duo, such as "Morning Moon", "Love Song", "Say Yes", and "Meguriai". Over half of their released singles were written by him. He has also written for many singers and groups in addition to Chage and Aska. In particular, his songwriting for Hikaru Genji in the late 1980s produced some of his most notable works. He began a solo career in 1987, and was highly successful in the first half of the 1990s. His most well-known song as a solo singer is "Hajimari wa Itsumo Ame" (The Start Is Always Rain), which was a single from his second solo album. The song reached #2 on oricon and sold over 1,160,000 copies. Success of this song lead him to widespread popularity across East Asia.