I like to see (in your photos) that older Japanese are out and about in great numbers.
Unlike here (in Australia) where I occasionally see elderly persons out shopping on their own in our country town (aka "regional center"), but nowadays very rarely in big cities like our closest, Melbourne. It may well be that those urban sidewalks are too intimidating or even outright dangerous for old people.
As for photographing same, I have to confess I'm too shy to do it. Or fearful for my life. Some of those 'oldies' know how to use their walking sticks as a defense weapon...
Good photos as always. Greatly enjoyed.