All of the story and most of the original language are present, although John R. Briggs' adaptation throws in generous amounts of Japanese references that prove only occasionally jarring. (A handy glossary of words and place names is provided in the program.)
The three witches have thus become three "yojos," whose incantations are delivered in kabuki-like fashion. And when Shogun Macbeth (Kaipo Schwab) sends his assassins to murder Banquo (Ariel Estrada), they are, of course, samurai warriors.
Pretty cool. More info at the original article. Also, info on the theater/production group here.
[via One Big Japan]