ATOM Corp. engages in the management of a chain of directly managed restaurants and franchise stores. It operates through the following segments: Restaurant Business, Izakaya Business, Karaoke Business and Sauce Business. The Restaurant Business operates restaurants serving steak, conveyor belt sushi, yakiniku, pork cutlets, cuisine, western cuisine, cafes and others. The Izakaya Business segment operates restaurant formats such as neneya, irohanihoheto, danya, amataro, yakitori center, and ginbuta. The Karaoke Business segment engages in karaoke store management. The Sauce Business covers the miyano sauce sales and others. The company was founded on January 14, 1972 and is headquartered in Yokohama, Japan.