We are not Christians and most of Japanese see X'mas as an opportunity to buy, give presents to someone, or to hold parties, to drink and eat so much, not as a religious event.
My kids also think X'mas as some the day when Santa claus would come to my home with their presents. (my son has already known " who Santa claus is " but my daughter is so adorable that Santa claus really exist.)
Hoping they can deserve great X'mas presents, my kids decorated a X'mas tree with ornaments.
While decorating I asked my daughter what Xmas present she hope and she said " It's a secret. I will meet Santa claus tonight and ask him for my present! "
"Her Santa claus" has already known what she wants and bought it!
-- from iPad