Black Torch

Jiro Azuma is descended from of a long line of shinobi, and he also can talk to animals. Although he may appear rough and tumble, his compassionate side emerges when it comes to furry critters. But Jiro's soft spot for animals gets him in major trouble when a suspicious stray cat fuses with him, granting him exceptional power but also dragging him into humanity's hidden battle against powerful, menacing spirits.

Synopsis from Anime News Network