You may not know that 7-Eleven is owned by a Japanese conglomerate, 7&I Holdings. Well, 7&I is expanding. Yesterday it bought a chain of upscale department stores in Japan for $1.1 billion dollars, making it the world's fifth largest retailer. That has WalMart, the world's largest retailer, sweating. That's because WalMart's had a heck of a time moving in on Japan. From WLRN in Miami, Dan Grech reports.