Fox and Sparrow by Ginger Breo

The Japan of bright lights and somber temples is gone. In its place is a horrific world of monsters--yokai--terrorizing all those who suffer in the wasteland of the Now.

Into this hell one fiercely determined woman must go: she is Suzume, the "Sparrow", and she seeks to rescue her grandfather, a hero to his people and a legendary Yokai-Hunter. Her only help in this mission is a kitsune, Suzume's sworn enemy: a liar, a seducer, and a powerful ally. Together they must face impossible horrors and confront their own prejudices as they race to save more than the life of just one man--the fate of Japan may hang in the balance.