Haha well if it makes you feel better, Japanese people don't expect you to know any Japanese at all and are pleasantly surprised if you know ANYTHING. Bonus points if you can read a little and have a conversation. xD
Well that's good to know for future reference.
And on a side note... you should definitely get to a BIGBANG concert if you get the chance. They put on one hell of a show Saturday. Most decidedly the best concert I got to see so far. ^^