Yes, Japan does celebrate Christmas, although it is a relatively new holiday in the country. Christmas was introduced to Japan by American soldiers during World War II, and it was not until the 1980s and 1990s that Christmas gained popularity in Japan as a cultural event. Nowadays, Christmas is celebrated in Japan with many of the same traditions as other countries, including gift-giving, Christmas trees, and festive decorations. However, some aspects of the holiday, such as Santa Claus and the emphasis on family and togetherness, are more uniquely Japanese.