Christmas season in Japan is very merry, but not religious much. We do not go to the church, do not sepnd with our own families or do not make any special traditional home made cakes/cookies, although we do shopping a lot (presents for children and whom beloved). In other words, it’s just on mercantilism.
On the contrary, on New year's Eve and on New year's day, we spend with our own families and have a lots of special traditional foods on the first three days of the year, as DR JANE knows. For example, boiled prawns, baked egg rolles, boiled many various vegetables with chicken… be served with square vessel by wood.