 Complete the following phrase:  Competing for Japan with former partner Narumi Takahashi, he is the 2012 World bronze medalist, the 2010 World Junior silver medalist, the 2010 JGP Final champion, and 200810 Japanese national champion. They were the first pair to win a World medal for Japan. After their partnership ended, Tran competed one season with Natasha Purich for Canada. Competing for the United States with Marissa Castelli, he is the 