What movie cartoon movie is this?

I saw this movie in the 7th grade and i didn't get to see the ending. Its a cartoon movie about this pro-bally (japanese) family of a mom a dad and a little girl and her dog. They went on a road trip and on the way they stopped to a town. but to get to the town they had to go through a tunnel. When they arrived. nobody seemed to be there. They were hungry and they found a little post of a fat guy cooking all these types of dishes. So that sat to eat and the parents ate furiously and they turned into pigs and the little girl got freaked out. I really don't remember what happens next but at night, ghost like figures come out with white masks. The only name i remember is that the little girls name is Sa.