U.S. citizen living abroad- Can I get my ticket sent to my Japanese address?

I am a U.S. citizen currently living in Japan. I signed up on the U.S. website (as my Japanese is poor) and I am trying to complete my booking. However, it seems that I cannot use my Japanese address to send my train ticket to. Should I just use my U.S. address and have my family forward it to me?

Also, I can't seem to use the raileurope-world website either.
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