Looking for a Title to a Japanese Horror Film?

A present day man travels from Tokyo and ends up stuck in a remote village. Where he stays with a family with some odd traditions. They keep the watch of the ashes of their ancestors; otherwise they will escape and attack people. Which is of course what happens.

The man that travels to the village becomes romantically involved with woman's who's job it is to keep the ancestors happy. As it turns out that the woman has a secret past, she'd been romantically involved with her brother and had gotten pregnant. Her family ashamed had her baby killed after it was born. Only it turns out that the baby was switched by one of the nurses by a still born baby and allowed to live. As it turns out that baby is currently the man she's romantically involved with. And finds out she is pregnant with his baby. It also turns out that mixed family blood is what's causing the ancestors to come to life and attack people.