T
part of his four sword style
You can throw dirt into peoples eyes and still remain a swordsmen. You can have a sword made from iron cloud and still be a swordsman.
Zoro did not calls it 2 swords and 1 scythe style when he picked up Killers weapon. He called it 3 sword style.
Kaku can name his style however he wants. Does not magically turn his legs into swords though.