Barca seems to have a lot of Japanese fans, and I believe that they've had training camps for kids there too. But I don't know how the players joined, although I think Lee and Jang were noticed when they played for a South Korean national team.
i watched another video, when watched after take's. video name was japanese ronaldo " takuhiro nakai " =) real madrid signed him 9 years old. and he is barca fan =)
but boy very talented.