Night walk in Nogata
Not the usual photo walk, but it works: Leave your home in the evening/night, select a street and then just walk it down all the way. It could be more interesting in one city than the other and in some countries it might be downright dangerous. But I feel very safe in Tokyo and the city is still very much alive at 10 pm, even in Nakano.
So I was walking down this street, passing shops, an antique clock, super markets which were still open and many other things that looked interesting.