I'm pretty sure it is, the normal size ones had small BxH text and the Giant had the big BxH, that said someone could just be using the bag as a way to pull wool...
thanks for ur help guys!!! actually its the giant one. something i wanted ever since, but never pulled the trigger. cant wait to finally get it. if anyone is interested in these, mandarake has it every now and then for 7.000 Yen only. ...when b x hunting pretty crazy to find so many og toys still sealed mib.