Christmas in Japan is a bit different from here. The major religion in Japan is Buddhism and Shinto, so Christmas is more commercial event. The main celebration revolves around Christmas eve and not Christmas day.
In Japan it is common to give Christmas presents. Within the family parents give presents to their children, but the children do not give presents to the parents. The reasoning behind this is that only Santa bring presents, so once the children no longer believe in Santa the presents are no longer given.
Most Japanese families would have a Christmas tree and now it is becoming very common to have lights on the outside of houses as you would see in Australia.
Japanese Christmas