Rent Nura: Rise of the Yokai Clan (2010 - 2011)

Nura is a Japanese animated series about a young boy who has a strange power passed down through the generations, the ability to turn into a creature during the night, something he can use for good or evil, something only he can decide. The series follows Rikuo, a teenager intent on avoiding the responsibility his heritage has given him as he helps humans all around him while fighting his beast like nature, something his grandfather is intent he embraces as he wants to give him his position as leader of his pack.