Tokyo night photo location suggestions?

Just back from my week in Tokyo and Nikko. I must say I very much enjoyed my visit. Photo-wise it was a dump, totally due to myself, but as an experience it was really great.

Even without knowing Japanese, it was very easy to get around in Tokyo and also outside, people were extremely helpful and the city was not as overpoweringly "jam-packed" as some other big cities; at least this time of the year, just a little outside the biggest streets the city actually had a surprising small city feeling to it.

So if you wanted to see Tokyo and Japan but thought you'd get lost: don't worry, just go.

My only suggestion is that if you go in the cold season, be prepared for the cold also inside.

Thanks to all for their suggestions, most of my photography ended up being so embarassing I'll just keep them in my family album :-)!