Aragami

Two gravely wounded samurai seek shelter from a raging storm at an isolated temple, the home of a swordsman and a mysterious young woman. One wakes to learn that his comrade has died and that his injuries have miraculously healed. He discovers that the swordsman has granted him the power of immortality, bestowed by a man once known as the legendary Miyamoto Musashi, who now exists forever as Aragami, a "god of battle".