Hajime Hyakkoku is a music composer born in November 24, 1958 (age 55) in Sapporo, Hokkaido, Japan.
He composes most of the K-ON! Original Soundtrack. He also did several changes in music and made development from each of the sound track and anime that he composes.
He is also in charge in several anime (in music arrangement section)
- Ichigo 100% - Theme Song Arrangement
- K-ON! The Movie - Theme Song Arrangement
- K-ON! Anime - Music, Insert Song Arrangement
- K-ON! Anime Season 2 - Music
- Voogie's Angel - Music