Uhh... Please don't use the word "japs". It's a racial slur.
And the reason why is because of a very successful KFC commercial that ran on television a few decades ago. It was a holiday promotion, and it was so good that now fried chicken is a Christmas tradition.
Sometimes japs (Idc, I'll invoke my beaner inmunity) surprise me. They have such a rich culture... and fall for the dumbest and least classy american trends.