"Don't worry we'll ease into it and start small. Onto Japanese tentacle porn! And then cat videos, and then a combination of the two!" <Are we sure the tenticle porn should fit in before the cat videos? Also, there are tenticle porn cat videos?
This is a Futakuchi-Onna (two-faced woman). One thing I liked about '47 Ronin' is that the supernatural powers of the witch character (Rinko Kikuchi) are Japanese. Her hair is like prehensile tentacles; in one scene she eats sushi holding the chopsticks in a lock of hair.