6 Systems
Roku Jutsu was created in 1993 by Martial Arts Expert Chris Harris with the purpose of creating an efficient combatives system that was well suited for the military and special forces. Over the years, Harris has trained in numerous styles, extracting only the most practical and useful techniques from each system. Below are the six styles that had the greatest impact on Roku Jutsu, accompanied with the top four movements and principles that were adopted from each.