It is not only Japan which put pressure on athletes. Yuna had so much pressure from the entire South Korea. Can you imagine how korean media would have treated her if Mao won instead of Yuna? Chinese and Russian goverments and sports federation put a lot of pressure on all the top athletes as well.It is just way it is.
As a person who spent fair amount of time in both countries, I can confidently say media in Japan puts far more pressure on their athletes than Korean media do.
I think Korean media concentrate more on results of the competition.
Once you win, you get swarmed with public interest and media exposure, and endorsements deals follow.
In such environment, athletes tend to state conservative goals in efforts to contain level of expectations.
Before Vancouver Olys, Yuna stated that she was mentally prepared to handle suffering an upset and had no plans to apologize to anyone even if she had lost the gold.
No major media outlet criticized her, and the consensus was that she was handling the pressure well.
Contrastingly, I think Japanese media put more emphasis in the build up process toward a big sporting event rather than the results.
They want their athletes to state bold goals so they can use them to elevate tension among the public.
Maybe this is why Mao said she had 80% chance of winning gold in Vancouver or Miki frequently stating intentions to attempt a quad salchow that she has no chance of landing.
Such pattern often end up in an anti-climax situation when athletes fails to deliver their promises, a la Mao in Vancouver or Miki in Turin.
Such difference if most vividly demonstrated in the build up for the soccer World Cup.
Korean team's official goal is to get past the preliminary league and become one of 16 countries that will compete in the tournament round.
Team Japan, on the other hand, has stated that their goal if to advance to final 4, though many feel that they will be lucky to avoid getting humiliated.