The companies that participated were the Kao Corporation (a manufacturer of personal hygiene, household detergents, and cosmetics), Toyota, Asahi Breweries, Panasonic, Kinki Nippon Tourist Company, Ltd, Ezaki Glico Candy, and Kokuyo Co., Ltd. (an office furniture and stationery manufacturer).
The involved firms were the Kao Corporation (personal hygiene, household detergents, and cosmetics), Toyota, Asahi Breweries, Panasonic, Kinki Nippon Tourist Company, Ltd., Ezaki Glico Candy, and Kokuyo Co., Ltd. (office furniture and stationery).