Asuka Takahashi has good qualities . It is too shallow to say that it is just her problem. To me, it might be a coaching problem. A good coach can bring out her potentials and , work on improving what she needs to improve and strengthen her strong points. If coaching is not the problem then i would say it could be a heart problem. hard to play when your heart is not convinced that you belong there, playing for your country on international level. Then this is where the coach can do something to encourage her. Most of points she lost is through her own unforced errors. Many points she won is not because of opponent unforced errors but because of her good attacking skills. Sometimes, I see Akane Yamaguchi doing this as well (many many unforced errors) when she wants to quickly finish the game and take a rest. Then, in the next tournament, she suddenly becomes highly motivated and wins everything.