In the arts and sciences, many talented emerging artists and researchers in Japan have a hard time, because they are rarely given a chance. Without already established reputations, they can't sell their pieces or ideas. Being desperate, some move overseas. After being successful enough abroad, they are finally accepted in Japan as well. However, by then they often choose to remain abroad. This results in Japan exporting its best and brightest for free.
In all aspects of Japanese society, there are widely accepted values, which are very narrowly defined. For instance, a woman has to be young, slim, have straight long hair, have an Associates Degree, and the requirements keep going on and on.
But because the accepted values are so narrowly defined, once they find a formula in a particular field, they will succeed. That's one of the reasons why many Japanese love to look similar. They are consistently following others. By conforming to social norms, they insure that they are accepted by society.
It is extremely difficult to change the existing perception of Japanese society. It probably will take decades of battling in order to make a tiny dent in the existing attitudes. But always some, such as women entrepreneurs who work in a fringe industry not dominated by men, find a way to get around without violating the traditional Japanese norms.