Hiroshi Miyazaki is a Japanese composer was a part of the sound staff at Tecmo. In 1985, he graduated from the Nippon Institute of Technology. In 1988, he joined Tecmo and left in 2007. After that, he worked at IGT's Japan division as a composer, working on their pachislot games. He is known for his work on the "Saruhito as expected" and "Yumegen no Nyoku" pachislots. When the company folded, he continued as a composer for pachislot machines under his own music business, MiyaOnMusic.
During his career at Tecmo, he was forced along with everyone else to use aliases.
His alias Sugito Miyashiro was used in several games. The "Sugito" part is unclear, but "Miyashiro" is a hodgepodge of his surname. Miya is simply a shortening of his surname, and Shiro is a combination of "Shi Ro" (しろ), as well as "Hiro" (ひろ). These hiragana combined together make up his given name.