It's been my observation that Japanese culture appears to be more accepting of and comfortable with people putting on personas to suit a particular mileu than in the west.
In the West we strongly equate what a person is wearing and their behavior at that moment with their overall identity. It's been my observation that in Japan a person may put on a persona like one might put on a costume and it be perfectly acceptable.
There's exceptions of course but nothing is more disconcerting to me as a westerner, watching an interview with a Japanese Rock and Roller or Rapper, expecting them to have the FU attitude I'm used to seeing during the interview and instead see them behave with politeness, nicely bowing at the right moments and talking politely to everyone.
It's actually quite refreshing in a sense to see this and I think it can encourage experimentation as it prevents people from getting too wrapped up with a persona they are building right now and drop it and try something else that suits their fancy.