Wow, I am just blown away by that message. Not because of it's content or anything... I know this girl here in Tokyo with an almost Identical story, same age, same visiting times to America, her friend is also visiting Japan next month. Only a few minor details differ.. or so I think. Anyhow, I don't know why I was compelled to share that? The stories are just SO similar. If I didn't know better I would almost suggest it to be the girl I know.
Anyhow, to answer the initial question, Tomomi. In my personal opinion, I do not find Japanese girls too short. Like another YD pointed out however, I am tallish too (about 6'1''). It doesn't bother me, if it doesn't bother the girl. In fact my ex from the states comes in just under 5'1''.
And hello to all the YD's. I am new in Japan as of 2 weeks ago and have come here twice before. I love it here in Japan. Also, very interesting stories on this site, and I am completely sympathetic towards the AAA.