Career
Miyazaki competed at the 2014 Winter Olympics for Japan. He teamed with driver Hiroshi Suzuki in the two-man event, finishing 28th, and with Suzuki, Shintaro Sato and Toshiki Kuroiwa in the four-man event, finishing 26th. Miyazaki made his World Cup debut in December 2013.
As of April 2014, his best finish is 19th, in a four-man event in 2012-2013 at Lake Placid.