According to Kotaku, Wang Yue Si, a chinese guy studing in Japan, who have made millions (both in yen and dollars!) on selling virtual weapons etc. on online games has been deported from japan for breaking the rules attached to his student Visa. The bank got suspicious when he regulary sent home big amounts of money and contacted the police. When it got clear that Yue Si made big amounts of money without the right (according to Japanese imigration laws) to do so, he lost his visa and got promptly deported.