The Immortal: Demon in the Blood — Ian Edginton

Wrongly branded a traitor by his fellow samurai, Amane is attacked and left for dead. When he is found by a mysterious tattoo artist, his life is saved -- and changed forever! Connected to an immortal oni through a mystical tattoo, he creates a new life for himself as Enma, an apprentice tattooist. But Enma's new life comes at a price he has yet to realize Based on an acclaimed novel, Ura-Enma by Fumi Nakamura, from Japan.