Around the world, kids' Christmas gifts include KFC, books and 'pooping logs'
http://edition.cnn.com/2017/12/20/health/christmas-facts-children-parenting-without-borders-intl/index.html
Though Christmas is originally an event of Christians, it became worldwide event even in countries where Christianity is not popular.
As is written in the article, Japan's KFC campaigns Christmas chicken. But, considering Christmas cake is also famous in Japan, many Japan's citizens seem to notice that it's one of the commercial tactics forcefully related with Christmas.