At Christmas in Japan, people often eat traditional Japanese dishes like KFC fried chicken, sushi, and Christmas cake. KFC is popular because it's considered a luxury food, and many Japanese families have a tradition of eating it on Christmas Eve. Sushi is also a popular option, as it's a healthy and delicious meal that can be easily customized to suit individual tastes. Christmas cake, which is a sponge cake with cream and strawberries, is a traditional dessert that is often served at Christmas parties in Japan.