I've travelled to Japan a number of times over the past 10+ years. So, pre-smartphone to full mobile/data/maps/e-guidebook with Google Maps links/etc. Also Google Translate (although in practice I find that less useful).

What a difference it's made to getting around! I recall going back a number of years finding many specific things could be a real challenge. I remember wandering around for an hour once trying to find our office.