 Finally settling on road cycling with Bridgestone Anchor in 2005, Miyazawa quickly established himself as one of Japan's top sprinters, reaching the podium not only in Japan, but in Asia and Europe as well.He was Asian champion in 2007 and represented Japan in the 2008 Summer Olympics.He was hired by the UCI Professional Continental team Amica Chips-Knauf in 2009 but returned to his Japanese team when Amica Chips floundered due to financial difficulties.