I dunno~ I don't think my DVD player has that option to change the region, but I found a code in the internet that was supposed to make your DVD player region-free... and I think it worked, 'cause it plays region-2 dvds just fine now ^__^
If your dvd has that option, and it said the region was changed to Japan, I guess it probably works~ but if it doesn't, I can give you the code, it might work with you too