Yoko Aki (阿木 燿子, Aki Yōko, born May 1, 1945) is a Japanese songwriter, actress, novelist and essayist. With her husband, Ryudo Uzaki, she has written many songs for other singers, with Aki as lyricist and Uzaki as composer. They are especially famous for a series of hit songs of Momoe Yamaguchi's.

She has acted in several films, and she won the award for best supporting actress at the 5th Hochi Film Award for Shiki Natsuko.
She was a model under an exclusive contract with Kanebo Cosmetics for many years.