Masayoshi Yamazaki (山崎まさよし, Yamazaki Masayoshi, born 山崎将義 Yamazaki Masayoshi on December 23, 1971, in Kusatsu Shiga) is a Japanese singer-songwriter who plays guitar-driven blues, rock, and pop music, though he has also recorded piano ballads. Though he primarily plays the guitar, he has played the drums, piano, percussion, saxophone, and glockenspiel on some albums.

He released his second album in 1997, which contained his breakout and most famous single "One More Time, One More Chance." This song was used in Makoto Shinkai's anime film 5 Centimeters per Second.

In November of 2002, he performed the Beatles song "All My Loving" for Sir Paul McCartney while the latter was backstage after a show in Japan on the Driving World Tour.