Japanese Horror Movie

The other night I was out for drinks in a quiet hotel bar with a friend, and this woman shuffled in.

She sipped her wine, while staring straight ahead, clutching her backpack which held...what? Drugs? A human head?

All I know is that I immediately thought of "The Ring" and said to myself "Must not make eye contact, must not make eye contact..."

Because you know if I did, I would be driving home one night, and suddenly see her staring at me from my rear view mirror.