I do too and it was a lot of fun, but unfortunately limited for us since we arrived in Tokyo end of October and then spent several weeks in the mountains to the north. We only really found any hint of Xmas in Osaka mid-November and probably our final night in Tokyo the first week of December, though it was way too brief. There's really no evidence of the holidays that I could find in smaller regional cities like Kanazawa or Nagasaki and certainly not in any of the rural mountain towns, which makes sense. I think it would be really fun to spend Xmas in Tokyo one year. Does the city ever see much snow at that time of year or is it pretty rare?