File:Zoro Using Busoshoku Haki.png

Summary
Roronoa Zoro using Busoshoku: Koka on his swords.

Source

 * 1) From Chapter 787.
 * 2) From Episode 719.
 * 3) From Episode 719.
 * 4) From Episode 719.
 * 5) From Episode 730.
 * 6) From Episode 720.