In Japanese cities, space is at a premium. So convenience stores that cram everything from Kleenex to rice balls into a few square yards are everywhere. You can't walk five minutes in most cities without running into one or two or even half a dozen.
But they're not just a place for Slurpees and snacks. Nearly 27 percent of Japan's population is now 65 or older, and convenience stores are changing to serve this growing market.