After 2 weeks in Japan (and many many minutes spent lost), I'm back home (more on all that later) and have been thinking about GPS, which seems to be pretty advanced, useage-wise, in Japan.
Now, the question is this: why would I need your address if I had your frontdoor's doorknob's precise GPS coordinates? Or to be more realistic, the GPS coordinates of your block, and the street address.
In most of the world, this is a moot point since addresses actually make sense... but in Tokyo... forget it!
So gimme that keitai with GPS and some app which allows me to plug in your coordinates... and hold my hand as I find you.
No?
This also plays on my idea of a suite of 3D software products for game consoles (and PCs) which allow travelers to virtually drive/walk/fly through places they are going to visit. Question of building the mental map before getting there.