Can you please suggest where in the USA or on-line may I buy _current_
Japanese postage stamps?

(Please excuse me if I had posted to a wrong group.  Any pointers to correct
groups would be much welcomed!)

I have an elderly friend (distant relative) in Japan who does not use a
computer (hence no email).  She lives in a somewhat smaller town in
Hokkaido.  In winter it is tough for her to go out and get postage stamps, I
imagine.  I wanted to send to her self-addressed, stamped envelopes when I
write to her.  Envelopes are easy, stamps so far seem impossible! So, can
you please suggest where in the USA may I buy _current_ Japanese postage
stamps?

Thanks!
Caveman
decodable email address:d24f-1vca (at) krzncf.pbz