Hiroshi Kawaguchi (川口 博史, Kawaguchi Hiroshi, born April 12, 1965) is a Japanese video game music composer and keyboardist who works for Sega. He is among the oldest of the Sega sound team members, and one of the few from the 1980s still active today. He joined Sega in 1984 as a programmer, but quit the job and became a composer the following year.