- semi-winter (from mid-December to mi-March) : half of the trees stay green, it hardly snows and never freezes, so that it doesn't really feel like winter.
It was pretty cold, but more of a sharp cold, when it snowed it really snowed quite ehavily and for a long while, but the snow seemed to melt away not long after.

It seemed to be getting warmer just about the time I was leaving anyway.

I have to mention though I stayed in Ome city, which is like, at the edge of mega-Tokyo.