Spirited Away is one of Studio Ghibli's most famous films. That's why it comes as no surprise that theories about the movie would spring up. An interesting theory is a possibility of Yubaba's bathhouse actually being a brother. The signage in front of the bathhouse reads "Yu" which means hot water. Seems rather tame? Well, women in prostitution used to conduct their deeds in a bathhouse. Get this, the women in charge of the bathhouse were also called Yubaba. Coincidence? You might find other parts in this movie that fits that narrative.