I have some Japanese friends that never could explain me this tradition. I always thought that it was introduced by some American navy/soldiers that while stati

I have some Japanese friends that never could explain me this tradition. I always thought that it was introduced by some American navy/soldiers that while stationed in Japan wanted to celebrate Christmas, and the only western restaurant in the city/region that they could find, was a KFC.. I still think my theory/urban legend is way better ;)