As Sijo (founder) Bruce Lee continued to develop in the martial arts what he was teaching was no longer, strictly speaking, Wing Chun. So he named it Jun Fan Gung Fu, named after himself, logically, since it was his system.
Jun Fan Gung fu is an actual system, with a structure, techniques, rank structure and progression. It is true to say that this technique "is Jun Fan" and that this technique "is not Jun Fan". Many people misunderstand Jun Fan gung fu or try to go around this system of techniques to go straight to Jeet Kune Do. However, Sifu Inosanto states, "You must study Jun Fan gung fu to understand JKD (jeet kune do).
Jeet Kune Do is a later evolution of Sijo Lee's self-expression through the martial arts. It is much more comprehensive in scope and is generally referred to as JKD Concepts today. In JKD Sijo Lee suggests we use concepts such as intercepting the opponent as he prepares to attack. Now this seems like a simple thing to understand, but pulling it off is another thing altogether. So, the concepts that are contained in JKD need physical examples. Those examples are contained within the Jun Fan gung fu system. What confuses people is that the concepts Sijo Lee taught are contained in other systems as well. So many times a JKD instructor will teach a JKD concept from a art other than Jun Fan gung fu.
However it would be difficult to do if you didn't have a base system (such as Jun Fan gung fu) to learn the physical applications of the JKD Concepts.
We are proud to represent Sijo Lee's Jun Fan Gung Fu and the Inosanto Lineage.