User blog comment:AYET/A Game of Numbers - Intro/@comment-2226235-20150605073002/@comment-2226235-20150605163641

Zoro has demonstrated the ability to use one sword style, two sword style and three sword style and has used all of them against Kaku's four sword style. Over the course of One Piece, he has used them against more than five major opponents, including the six sword style user, Hachi, although he has never fought a seven sword style user.