Quick review
I got a chance to see this at a Sundance screening.
A bit of explanation: in the universe of the movie, bugs are soul-chunks that live as small, invisible (to most people) creatures and sometimes occupy human bodies to feed off of, causing illness or extraordinary talents.
The movie follows the life of a young Bugmaster, a traveling doctor of sorts specializing in the research of bugs and the treatment of illnesses caused by them. The Bugmaster finds himself in search of his origins and lost memories to explain how he became what he is.
Bugs are brought onto the screen by CGI effects, causing an unexpected but very exciting fusion between the classical visuals of the live-action movie and the high-tech flashiness of the CGI creatures. Note that despite its anime roots, Bugmaster doesn't contain any fighting, T&A or other similar pursuits.
As Japanese movies wont, this piece is a bit too philosophical and overlong for its own good. But between the beautiful scenery, pretty CGI and unusual story, I only occasionally found myself bored. I recommend seeing this movie if you are in a mood for something decidedly non-Hollywood, and you are ready to immerse yourself in a fantasy world for a couple of hours.