Japan 2010–2012 Teenagers and middle-aged women from the upper class
United States Before 2010 Mostly Korean Americans
Since 2010 Mostly Korean Americans and other Asian Americans,[24][261] but also some Caucasians and a growing number of African Americans[23][25][262]
Rest of the world Since 2010 Mostly teenagers and young adults,[263] especially girls, women in their 20s,[264][265] and some women in their 30s[266]