Why do so many eyes appear throughout the movie, as well as the hiragana for meme, that means eye? Is there any reason or is it just coincidence?

See here the shop sign ---> http://postimg.org/image/ybm6fiu4l/

And here on the pot on the right ---> http://tinypic.com/view.php?pic=2wr0nrp&s=5

And here on the spirit ---> http://postimg.org/image/3t6uwz6zp/

And here in the corner of the bag ----> http://tinypic.com/view.php?pic=2zdw48y&s=5

So... any ideas?