Well I googled the lyrics for you mate, they were nowhere to be found on the intarweb. Im thinking this was; A. Made for the commercial, which is kinda weird because it is in japanese. B. Really unknown song/singer in which case It will be veeery hard to find. But good song though I liked it.
I'm not sure if you know the lyrics or not so I wont post them. But if you don't and want to know them just give a reply and Ill post them.