"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.
The Futakuchi-onna (Two-Mouthed Woman) : in Japanese mythology, there was a miser who lived by himself because he did not want to spent money on food for a wife. When he met a woman who did not eat anything, he married her, but soon his stores of rice began decreasing. One day he stayed behind from work to spy on his new wife. He saw her hair part on the back of her head to reveal a gaping mouth. She unbound her hair, which reached out like tentacles to shovel the rice into the hungry mouth.