The Rokuogan is the secret and ultimate attack of the Six Powers style. Rob Lucci states that only those who have absolute mastery of the other six skills can have access to this seventh skill.
- Six Powers Ogi: Rokuogan (Six Styles Ultimate Technique: Six King Gun): Used by Lucci. This is the ultimate Rokushiki technique that can damage an opponent internally, similar to the Impact Dial, or of equal or more strength to the Reject Dial, but the technique is considered to be much more powerful, and can be performed without the side effect of great pain to the user. It appears to be two fists held at close range that can damage the opponent with a blast powerful enough to cause even Luffy to cough up blood and come close to death.