Read interview with Misako Aoki at Harajuju.net:
What do you think the typical age range in Japan is?
The range would be anywhere from 25 to 40 in Japan. Lolita fashion is a very, very expensive fashion, so in that sense it’s very difficult for younger audiences to easily go into it. It takes a lot of planning and budgeting. So it’s not the sort of thing you can just casually get into. There are people in their teens, but it is mostly people from 20 to 40.