Convenience stores in the United States don’t have a particularly good reputation (for the most part) when it comes to culinary offerings, unless high cuisine for you consists of Doritos, Gatorade and a hot dog that has been sitting in a warming case for hours. But in Japan, convenience stores (known as konbini) are entirely different, offering a wide variety of fresh foods to go, including modern staples like onigiri rice balls and sandoitchi, or sandos, which come on shokupan, a sliced milk bread. Sandos have become a bit of a cultural phenomenon — and even a tourist must-do — over the past decade as people mix in quick and flavorful to-go meals with high-end sushi or soba noodles.