 This marked an era of standardization for "yatai", as corporations, seeing an economic opportunity, began selling "ready-made" "yatai" carts in the 1950s, in exchange for a portion of sales.As Japan's economy boomed, many of the "yatai" transformed into storefronts, giving rise, particularly, to several ramen chains, such as Harugiya Ramen in Tokyo and Ide Shoten in Wakayama.However, city officials grew wary of health risks posed by the traveling food stands and, ahead of the 1964 Tokyo Olympics, new regulations were created which led to a decline in "yatai".