Yukiko Okada (岡田 有希子, Okada Yukiko, August 22, 1967 – April 8, 1986) was a Japanese singer and actress, active in the mid-1980s. After winning a nationwide television show at age 15 in 1983, she debuted as an idol in 1984. Okada made her debut in 1984, when on April that year, she released her first single, "First Date", written by composer and singer Mariya Takeuchi. She was nicknamed "Yukko" (ユッコ) by her fans, which is a common abbreviation for the name "Yukiko" in the Japanese language. Her smile bore the same name: the "Yukko smile".