Masashi Sada (さだ まさし, Sada Masashi, born April 10, 1952) is a Japanese singer, lyricist, composer, novelist, actor, and a film producer.Sada formed the folk duo Grape with Masami Yoshida in 1972, and made debut as a recording artist a year after. The pair rose to fame owing to a hit of a song "Shourou Nagashi" (精霊流し) composed by Sada, which peaked at the number-two on the Japanese Oricon chart in 1974.