I couldn't find an answer for this anywhere, so:
I arrived in Japan a month ago, but my dad and his friend want to come up and visit me in December. We'll all have the Tourist Visas, with that fancy stamp.
My question is: Can they buy a JR Pass for me in the U.S., even though I'm already in Japan?
Would someone block my ability to transfer the voucher for a JR Pass because I was in Japan when the voucher was purchased?