From what little contact i had(a friend has japanese grandparents, he came to visit one time) they're quite shy, stay to themselves and all.
They seem to have an incredible ability of focusing on something, it's quite a sight.
A bit xenophobic, but here on brazil we are way too 'happy gogo'.
So maybe a bit of inter-communication with brazil woud be good, brazil could learn a thing or too(like when to shut up, or more seriously, that study is serious business, and not punishment from god).
Also,
THEY SHOULD GET LAID.