Gōjū-ryū (剛柔流), Japanese for "hard-soft style", is one of the main traditional Okinawa styles of karate, featuring a combination of hard and soft techniques. Both principles, hard and soft, come from the famous martial arts book used by Okinawan masters during the 19th and 20th centuries, the Bubishi. Gō, which means hard, refers to closed hand techniques or straight linear attacks; jū, which means soft, refers to open hand techniques and circular movements. Gōjū-ryū incorporates both circular and linear movements into its curriculum, combining hard striking attacks such as kicks and close hand punches with softer open hand circular techniques for attacking, blocking, and controlling the opponent, including joint locks, grappling, takedowns, and throws.

Okinawa Prefecture is the southernmost and westernmost prefecture of Japan. It has a population of 1,457,162 and a geographic area of 2,281 km2.