Directed by Koichi Onishi, “Sketches of Myahk” is a documentary film about traditionally inherited chants in praise of God and sacred songs of Miyakojima vanishing in the time. The film received Special Mention by Semaine de la Critique of Locarno International Film Festival 2011.
To learn more about the film, go to this link: http://www.kubotamakoto.com/som.pdf
http://www.hmv.co.jp/news/article/907100152/ (in Japanese)
You can sample some of the music on his website, http://kubotamakoto.com/, under the Blue Asia section in Discography.