Traditional Japanese Christmas fried chicken.
Really, it's no stranger than any of all the other odd foods eaten in various countries during Christmas. Many countries have turkey or pork - in Sweden it's a whole ham, eaten over several days. They eat goose in Germany, green cabbage and eel in southern Sweden while Finns and Russians eat pirogs. And fried chicken is certainly preferable to the lutfisk eaten - for reasons unknown to science - in Norway and northern Sweden.