[enyafriend]

Some people find themselves to be great and act superior over others. In the end, they'll be subjected to the gaijin treatment. And then they post all things bad about Japan.
Well, 2 week stay is a short one. So you'll be fine. Do not brag and belittle others. Be humble and polite. When unsure, ask. When in awe, express that. Show courtesy and say complimentary remarks when the occasion arises. The point is: when in rome, do as the romans do.