Yū Aku
is Pink Lady's third single release in Japan. Inspired by the novella "Carmen", the song was written by Yū Aku and Shunichi Tokura, and was released on March 10, 1977. The single sold in excess of 1,100,000 copies, and reached the number-one position on the Oricon charts in April 1977, and maintained its place at number one for five weeks. It also reached the number-one position on the Japanese Music Labo charts.