MFJ All Japan Roadrace Championship
A late starter in road racing, Miyazaki first entered the Japanese Championship at the age of 23. After his first win in the GP250 in his third year, Miyazaki became a top ranker, and moved to Italy in 1996 to race in the World GP. After 4 years in WGP, he returns to Japan. In 2002, he wins the WGP 250cc race at Suzuka as a wildcard entry. He goes on as a 250cc specialist, but moved to ST600 in 2004. In, 2008 after setting up his own team, he ranks 2nd in the Championship with an older machine. 2009 was a setback for Miyazaki. After winning the pole position in Autopolis (Rd3), unavoidable crashes and injuries took him out as a Championship contender. In 2009, he joins Ito Racing GMD Suzuka.
Miyazaki is well known for his sensitive throttle work. He is also well-known as a R&D rider, where he developed the Yamaha TZ250, Yamaha YZF R6, and Dunlop tires. His idea has also been widely utilized in helmets and leather developments. Miyazaki also coaches riders in the Chinese Championship. His students ranked 2nd and 3rd in 2009, after Miyazaki started coaching them. They were ranked in the 20th’s the year before.