This photo was taken in Tokyo.
I am not sure exactly what it means in the sign, but my guess is "be aware of Santa Claus"?
Japan has adopted many different cultures over the many centuries. Christmas is one example.
You may be surprised to see how much of Christmas is found all over Tokyo.
These days most young people consider Christmas as a romantic event. Couples spend the night together at a hotel after having a nice dinner.
Sounds funny? Well, maybe.
But the way people in Japan feel about the new year is very close to the way people in the West feel about Christmas.
This is just another way of enjoying Christmas. So I would say, why not?