Although technically all non-canon characters "don't make sense" in One Piece, these ones seem especially ... This sword was notably forged by Kozuki Sukiyaki, Oden's father, who is a master ...

Roronoa Zoro has used many notable weapons and swords over the course of One Piece so far and this is everything fans know ...

According to Kozuki Sukiyaki, black blades are quite special in One Piece and any blade can be turned into a black blade. This doesn't necessarily imply Haki Imbuement turning a blade black ...

In the One Piece world, Roronoa Zoro of the Straw Hat ... It was forged by the great Wano swordsmith Kozuki Sukiyaki and was given to Zoro two years ago in Loguetown by the arms dealer Ipponmatsu.