"The Wado Ichimonji is a sword of great personal importance to Roronoa Zoro. It was forged by Shimotsuki Kozaburo and was once a prized heirloom of his family. It is also one of the 21 Great Grade swords. After the death of its previous owner, Kuina, Zoro asked for it from her father, who then gave the sword to him." -One Piece History
The single-pass grommet hole construction creates less friction between strings, this effectively reduces tension loss, while extending string life
Inspired by military helicopter, multi-layered structure made by carbon fiber and composites minimize material size, reinforce handling feel and performance at a critical standard.
Different frame structures including Power-box Diamond, Aero and AeroDynamic are arranged and integrated based on computer simulation to optimize the hitting, frame characteristics, and overall performance.