Uechi-ryu is practiced with two kinds of bunkai, "yakosuko" or pre-arranged and "oyo" or free, not-prearranged applications.
Yakosuko bunkai is a training method where a pre-arranged series of attacks and defenses is learned and practiced.
Oyo bunkai is a training method where a practitioner is spontaneously attacked and must use movements from the form to negate the attack. Oyo bunkai is introduced once the practitioner is comfortable with the techniques.
Washington Karate Academy students train four bunkai that are based on four kata in the system.