Por un escritor de hombre misterioso
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.
One Piece Wiki
Four Sword Style, One Piece Wiki
Yubashiri One Piece Katana (METAL)
Sword, One Piece Wiki
Katana - Wikipedia
Kikunojo, One Piece Wiki
Kogatana, One Piece Wiki, mini yoru mihawk
One Piece Swords and Its Grades (A Complete Guide)
Meito, One Piece Wiki