Generally when I travel I prefer to walk from place to place (e.g. hotel, meetings, bars etc) as much as possible. But in big cities it's not always easy to know beforehand how practical this will be.
But for next week's various Liberty Alliance event locales around Tokyo, I've been able to 'walk' the routes 'to and fro' using Google Maps Street view.
As far as I can tell, walking will be practical - with sidewalks where I need them, no insurmountable freeways, and appropriately spaced konbini along the routes.
Although I am a little worried about that delivery van headed right at me.