I've been watching a lot of Asian horror movies lately and I have to wonder why so many of them use hair as a tool in the films? Does hair have some special symbolism in Japanese culture that I am unaware of? And if so, how does it tie into horror films?
I know I'm answering a 3 year old comment - but, the water really got to me, too. They really knew what they were doing in this movie because water does not belong in the house - great way to get us out of our comfort zones. Very clever I thought!
As the other person said, it is a common symbolism of Japanese 'yurei' or ghosts. The long, straggly hair comes from the tradition that women (who always wore their hair pinned up in the old days) had their hair down for funeral and burial.
I know this thread is six years old, but I thought I would answer the question anyway in case any one comes back or any new people read the thread like I am doing today.
One of the things that the Japanese find scariest is covering the face. Basically it symbolizes the unknown. This is also why so much Japanese horror had ambiguous ending. Not knowing what caused the horror to happen, not being able to know exactly how it ended and not being able to see it for what it is. Watch a lot of Japanese horror films and you will notice that in addition to just a lot of hair, it is generally always covering the face of the ghost as well because it is scarier not to see the ghost's face and not really know anything about it.
My source for this was Dr. John Benteley, who is the professor of Japanese language and culture at Northern Illinois University.
date an Asian Girl and you know why there hair is stuff of nightmare's, manages to get into every orifice known to man, sink hole's, behind the bog, in the AC, mind of it's own. I fully understand the Asian Horror Women's Hair genre, it's a real problem.