As mentioned in the thread on bands with great range, there is one called Geinoh Yamashirogumi. However, you need to be able to read Japanese if you want to be able to find their CDs (outside of Akira.) So here’s some links:
Thanks for the links. I was going to mention Akira in that thread since he isn’t exactly a household name, but I didn’t get round to it. Ohgonrin Sanyo looks interesting, since the choral works I like I like very much (I’m the same way with organ music and death metal).
I just got “Ecophony Gaia” and “Ecophony Rinne,” both of which are said to form a “trilogy” with the score to Akira. They’re just totally awesome albums; they’re like if Popol Vuh took their Herzog scores to Japan and did them with early samplers and digital synthesizers.