During his teenage years Miyahara began playing guitar and was impressed both by
heavy metal and the burgeoning
MTV culture of mainstream music in the 1980s. While Miyahara was still in school he developed his skills as a music producer. During this same period he traveled to Korea, where he became friends with other musicians of similar backgrounds and first began taking part in recording sessions as a producer. In 1999, he commenced his full scale music career. In 2002, Miyahara released his first song as a producer, "Tsubasa wo kudasai", which was used as the theme song for Japan's national team in the 2002
FIFA World Cup, co-hosted by Japan and Korea. Miyahara's breakthrough success came in August 2008 with the release of Spontania feat. JUJU's "Kiminosubeteni", which he produced. The song reached number 1 on the
USEN chart, fourth in the yearly iTunes ranking "" and was downloaded over 5 million times. In 2009, another of Miyahara's productions, JUJU feat. JAY'ED "Ashitagakurunara" ranked No. 1 on the
Chaku Uta hit charts "". ==J-POP Music Group==