Christmas is not a national holiday as is December 23 here in Japan. Emperor Akihito was born the 23rd of December in 1933, and this day is rememered by everyone. The Emperor's Birthday (tenno no tanjobi) is a national holiday, and Christmas is not.  Christmas is, however, celebrated by an increasing number of Japanese and this song is by Japanese Christians singing a J-pop style song which was a Christmas give-a-way on CD at the local Christan book store a couple years ago. I do not know who it is so if anyone does know, please post a comment on the web page so that we can give the group or individuals the credit they deserve.  Ultimately, all praise and golry to the author of Christmas, which is Christ Jesus of Nazareth, of whom this song was intended to glorify or praise.  Enjoy.