It does not say that there is any contact between leaders and followers. It does say that the upper classes set the trend by buying and wearing the most *expensive* fashions available. The followers see the tend and if they like it or they have confidence that it will be the next trend, they buy into it. They are a very important group: they can deal with the cheaper lines and make a style more noticeable without paying the price that the trend setter would pay.
These Rankings Are Widely Reported And Accepted. Moreover, The Ratings Shape Day To Day Social Interaction: Japanese Find Is Difficult To Sit, Talk . ...corporations, universities, ...