General & Others - Luffy and Sanji rokushiki

Rokushiki/Rankyaku, OnePiece Fanon Wiki

One Piece Gold - Rob Lucci's vivre card said that: The training required for the acquisition of rokushiki is akin to that used for acquiring haki. Akin = in the family Rokushiki

Rokushiki, Wiki

Do top tier One Piece characters use the 6 powers? - Quora

Rokuogan, One Piece Wiki

Rokushiki, Wiki

Who's-Who still hasn't revealed his true strength! - One Piece

The Rokushiki Techniques Explained

Fanfic - **** My Nico Robin: Rokushiki style Project! ****

Rokushiki & Seimei Kikan - One Piece: Lion's Path by TyrantTron335