For the type of sword, see Katana. KATANA is a song performed by Roronoa Zoro for the One Piece Nippon Judan! 47 Cruise CD. Like the other songs in the album, it references a location in Japan, this location being the Fukushima Prefecture.
Sword, One Piece Wiki
Warabide Sword, One Piece Wiki
Katana - Wikipedia
Three Sword Style/One Sword Style, One Piece Wiki
Katana - Wikipedia
Kogatana, One Piece Wiki
Category:Katanas, One Piece Role-Play Wiki
Wado Ichimonji, One Piece Wiki
Shimotsuki Kuina, One Piece Wiki
Karakuri Sword, One Piece Wiki
Kozuki Toki, One Piece Wiki
Meito, One Piece Wiki