Culture shock #3: The sky
There are probably a billion geological and meteorological reasons for this, but the skies over here simply look different from the ones in Japan. It's hard to explain exactly in what way they are different but I think it is still quite an apparent characteristic.
Culture shock #4: TV
I've never really been a big fan of Japanese TV that for the most part makes me feel like I'm being sonically and visually beaten up, so it is quite a change to be able to watch television programs that chug along at a leisurely pace and don't chop everything to pieces with commercials.