Japanes women, particularly girls make some pretty funny noises. This is particularly apparent in the "pretty" highschool girl set, but also post highshcool, there are some great sounds produced. There is giggling, which while stupid, i think is pretty standard across the world, i've been giggled at by groups of young women in the USA, Europe and now Japan. The really peculiar noise here is the one that they express surprise with. It sounds like kind of a "haruuuuuuhhh??" Think of maybe the pondering "hmmm" crossed with a dry-heave and you pretty much have it. I just have to think, "Do they really consider that a cute noise?" They must because they make it all the time.