"Happy Life" is a song recorded by Japanese singers Mika Nakashima and Salyu. It was released as an exclusively digital single by Sony Music Associated Records on May 12, 2017. It was co-written by Takeshi Kobayashi and Yuko Ando and composed, arranged and produced by Kobayashi. The song was subsequently included as a B-side on the single "A or B". "Happy Life" was used in Tokyo Metro's televised commercial campaign Find My Tokyo, starring actress Satomi Ishihara.