This is a pretty big battle and one that would be decently close. Inuyasha and Sesshomaru are both pretty powerful swordsmen and they have a range of abilities. Sesshomaru has the advantage in that area thanks to his teleportation and telekinesis, but Inuyasha has some abilities of his own. His swords can destroy dozens of enemies in a single shot, but Sesshomaru can match that feat as well. Sesshomaru just seems to be the stronger fighter, but Inuyasha is not to be underestimated. He will be back to fight again soon. Sesshomaru wins.