He began making music for the Shiki Theater Company and Tokyo Disneyland as early as while he was studying in Tokyo University of the Arts, and has never stopped ever since. Miyagawa has won two excellence awards. He won the Yomiuri Theater Award for his music for the play “Shintokumaru” in 1997, and yet again in 2005 for “Hamlet”. in 2000, he won the Tokyo Metropolitan Theater’s Best Musical Award for his work in “Miracle”.