元気ロケッツ
Besides designing video games, Mizuguchi has expressed interest in directing music videos. One of the music videos included in "Lumines II" for the song Heavenly Star by Genki Rockets was directed by Mizuguchi, who also co-wrote the lyrics of the song. He is known for collaborating with various DJs and music producers for the soundtracks of his games, including Ken Ishii, Tsuyoshi Suzuki, and Mondo Grosso. On July 7, 2007, the character Lumi from Genki Rockets (also the principal character from "Child of Eden") opened the Live Earth concert in Tokyo in a holographic performance, and introduced a holographic video projection of Al Gore.