dancey, sounds kinda japenesy, out last year
some suggestions were fragma (don't know them) & daft punk (wasn't them) i know its vague but drivin me nuts!
try 'Heart of Asia' by Watergate. It's kinda cheesy oriental. Don't know about Japanese. Oh, and it's sometimes called 'Heart of Asia/Merry Christmas Mister Lawrence.'
Describe instruments etc... or the way it builds or breaks, at least the type of dance music it was... in what way was it Japanese... need more info... i could give you 20 tracks matching those criteria of the top of my head! (did it have a violin... there's one particular tune that pops to mind with a violin...)