Episode 470: The Great Swordsman Mihawk! Luffy Comes Under the Attack of the Black Sword!

Subtitled
Luffy runs into a lethal roadblock in the form of Hawk-Eye Mihawk. The legendary swordsman is determined to halt Luffy's onslaught, but Ivan-san, Boa Hancock, and Jimbei aren't ready to give up the fight!
TV-14