Rokushiki (六式 Rokushiki?, literally meaning "Six Styles") is a special, superhuman martial arts style. In the Viz Manga, they are called the Six Powers. They each made their appearances in different Chapters and Episodes, but the technique made its debut when one of the moves appeared in Chapter 342 and Episode 242. It was first introduced being used by the CP9 agents.
The strength of a Rokushiki user is measured by Doriki, which Fukuro can use his "Te-awase" to calculate with. The higher the level, the stronger each technique's potency becomes. Most of the users have their own variation of each technique, to increase their versatility and originality. Also, certain users tend to be more specialized in one technique, such as Kaku with Rankyaku, Jabra with Tekkai, Fukuro with Soru, and Rob Lucci with Shigan.

The Rokushiki style are the main style of combat for the World Government secret CP9 agents, but some Marines have also demonstrated its usage. Coby used Soru against Monkey D. Luffy, and later Vice Admirals Momonga and Dalmatian used it to confront Luffy at Marineford. It is unknown exactly how much the Rokushiki technique is spread around the Marines. Outside weapons and Devil Fruits, the series is very obscure about which technique overall Marine combatants use.