Differences in iPad Japan vs Canada

I am currently living in Japan and have been contemplating on purchases a tablet for a while now. After the new ipad release, I have decided an iPad is probably the correct tablet to go with.

Does anyone know if there are any differences between the Canada model and the Japan model. This is for the wifi 16 Gig model.

I highly doubt there are any but just in case someone knows of something, please post.

Thanks a lot