According to the official website, the winner of World Cosplay Summit 2009 Championship was Japan. ＹｕＲi and RiE dressed in costumes of Sanada Yukimura and Date Masamune. The runners-up was Spain (in Candy Candy costumes) and US in Cardcaptor Sakura costumes won the Brother Prize.
30 people from 15 countries participated in the championship.
Source: WCS official website *pictures and movies
