My favorite restaurant chain stock currently has just 81 locations, but also a proven concept and big expansion plans. Here's why I'm picking Kura Sushi USA (NASDAQ: KRUS) as my ultimate growth stock. Kura Sushi USA was established in 2008 as a separate company to operate Kura Sushi restaurants in the U.S. The stock is volatile, but the growth isn'tKura Sushi USA's five-year stock chart almost looks like a readout from a heart monitor. Through it all, however, Kura Sushi USA has been quietly accelerating its growth.