[Gahzirra]

Do not wear sunglasses, you will look like you are up to something.

Sunglasses are super rare in Japan, the only time I saw people with them on was when they were super drunk or the fashionista.

oh and as stated don't think of it as rude if you are sat away from all the Japanese at restaurants or events, as much as the Japanese love foreigners we make them uncomfortable because they don't want to be embarrassed if they cannot communicate with us. Haha, I bought a seat in one of the really nice boxes at a Sumo tournament...all the other boxes were full by the end of the tournament, mine...just me.