ATOM Corp. engages in the management of a chain of directly managed restaurants and franchise stores. It operates through the following segments: Restaurants, Japanese-style Bars, Entertainment, and Others. The Restaurants segment manages conveyor belt sushi, yakiniku, steak, tonkatsu, shabu-shabu, ramen, Western, and Japanese cuisine restaurants. The Japanese-style Bars segment operates bars and taverns. The Entertainment segment manages karaoke shops. The Others segment includes the production of Miyanotare sauce. The company was founded on January 14, 1972 and is headquartered in Yokohama, Japan.