My setup is non-ideal for 7.1 anyway.. My couch is against the wall, so there's nowhere to put the other two speakers even if I had them. And, as Weasel said, there really isn't much out there that's actually encoded in 7.1, so you'd rarely have any opportunities to use it, until more sources come along.
And, for the record, the word "Jap" is generally considered derogatory, and most Japanese people find it insulting. I'd strongly recommend changing your sig.