SEASON 4 • EPISODE 300
One Piece
"Zoro the Fierce God! The Incarnation of Asura Revealed by His Soul"
Date Aired: Mar 11, 2007 (Japan)
Zoro finally defeats Kaku with his new power, Asura, while Luffy activates Gear Second in his fight against Lucci, who in turn transforms into his half-leopard form.