Koichi Sugiyama was a classically trained composer and arranger for Japanese media. A legendary figure within the industry and a trailblazer for orchestral game music, he is most famous for his music to the Dragon Quest series. His music is a mix of various Classical styles and 20th Century Film music. He recorded many symphonic suites for Dragon Quest since 1986 up to 2018, performed by the London Philharmonic Orchestra and the Tokyo Metropolitan Symphony Orchestra. He died from septic shock at the age of 90 in 2021.

Birth name in Kanji: 椙山浩一