Katana (刀) is a traditional Japanese sword.
Katanas are traditional Japanese swords. These swords were introduced into the New World by the Eight Greed Kings around five hundred years ago. To this day, katanas are look upon as a popular item sought out by many warriors. The only place they are forged and produced is located in the fallen capital of the Eight Greed King's empire, Eryuentiu.
Their appearance are exactly the same as earth's counterparts, with the standard long but thin blade and same standard hilt design.
Despite being non-magical weapons, katanas are praised for their sharpness. The New World inhabitants hold them in high regard as they possess a superior cutting ability compared to ordinary magic weapons.