Kosshijutsu is the art of attacking an enemy's organs and nervous system, including the muscles and skin. The techniques of Kosshijutsu utilize spacing and distance to off-balance an opponent. The movements use circular motions to confuse, unbalance, and generate power. For these reasons, Kosshijutsu is commonly associated with the element water, and in this way, practitioners will overcome their enemies by naturally and effortlessly flowing into the spaces around their opponents as they move. As the student of Kosshijutsu circles his attacker, conforming to his movements, he will use his enemy's force to his own benefit, drawing him off-balance while attacking to the skin, organs, and other secret points (Kyusho).
The fundamental techniques of the Genbukan Taijutsu curriculum are derived largely from Gyokko Ryu Kosshijutsu. Gyokko Ryu is the traditional school of Kosshijutsu that we still practice to this day. This is due to it's fluid, natural movements, which if practiced regularly, develop a very high level of basic muscle memories that can be used in infinite ways both inside and out of the dojo.