Naomi Chiaki (ちあき なおみ, Chiaki Naomi, born September 17, 1947), is a Japanese singer and actress who worked from the late 1960s to the early 1990s.Chiaki made her debut as a singer in 1969, and released her breakthrough single "Yottsu no Onegai" in the following year. "Kassai", a song which has been commonly considered her signature song was released in 1972 and gained success, and finally won the 14th Japan Record Award.