Christmas!!! In Japan?

Gosh... It's near Christmas already. Another year has gone by so fast =). Anyway, with the spirit of Christmas, deep inside my heart I am always wondering, why do Japanese celebrate Christmas? The fact is 99% of Japanese people are non Christian. So I did my home work and googled it up. I found some interesting articles about it. Check it out if you also want to know :

http://www.tanutech.com/japan/jxmas.html

http://www.christmasarchives.com/wjapan.html

http://www.thejapanfaq.com/celebrations.html