KanZeOn is less a documentary and more a spiritual experience. The film is an exploration of sound and its links with and role in Japanese Buddhism and shintoism. The film is structured as a series of chapters or incantations, and revolves mainly around three fascinating figures and musicians - Akinobu Tatsumi, a young Buddhist priest who takes care of a temple near Kumamoto City and spends his spare time as a hip-hop DJ; Eri Fujii, a woman who has spent her life mastering an ancient Chinese bamboo wind instrument called a sho, and Noh theatre and kotsuzumi.