Friend is going to Tokyo, Osaka, and Kyoto, what should I have him look out for

I know to not have him get any cards that would be illegal in events here in the U.S. but are there any unique resources, play mats, etc. that are either only in Japan or is more available there than it is in the U.S.? Also even Gundam in general, if there is something interesting I should have him grab let me know.