Kajukenbo is a hybrid martial art that combines Karate, Judo, Jujutsu, Kenpo, and Chinese Boxing. It was invented in 1947 in Oahu, Hawaii, at the Palamas Settlements, to deal with local crime, as well as to help the people defend themselves from U.S. Navy sailors who would drink and fight with the locals. The inventors were Sijo Adriano Emperado, Peter Young Yil Choo, Joe Holck, Frank Ordonez, and Clarence Chang, who called themselves the Black Belt Society. The name works in two ways: "ka" ("long life"), "ju" ("happiness"), "ken" ("fist"), "bo" ("style") or "ka" ("karate"), "ju" ("judo"/"jujutsu"), "ken" ("kenpo"), "bo" (Chinese "boxing").

Tracy's Karate was founded by the Tracy Brothers, Al and Jim. The Tracy brothers began their martial training in fencing, boxing, and wrestling. They embarked on their study of Kenpo with Ed Parker and his first Black Belt, James Ibrao, in 1957, while attending college as pre-law students.