Here in Japan, Christmas definitely isn't celebrated in the same way as in traditionally Christian countries. It isn't a national holiday and though many people buy presents for the kids, eat cake and even put up a tree, it's just doesn't have the same meaning. I'd put it on a par with Halloween and Valentine's Day - another event that the Japanese have adopted purely for the fun of it.
The most important event on the Japanese holiday calendar is New Year, just a few days away! I'll have a week off and am looking forward to the break from work, time with the family and some good food and wine