Boss is a Japanese brand of ready-to-drink coffees founded by Suntory in 1992. These canned coffees are found in many grocery stores, supermarkets, and dedicated vending machines as one of the most popular brands of coffee in Japan. They are famous for their proprietary flash brew process: the ground beans are brewed quick and strong before being flash chilled for maximum taste. The aroma, flavor, and essence of freshly brewed premium coffee is captured in each can.