Kongō Gumi Co., Ltd. (株式会社金剛組, Kabushiki Gaisha Kongō Gumi) is a Japanese construction company.A long-established Japanese business (), it was the world's oldest continuously ongoing independent company and is currently the oldest known company overall, operating for over 1,400 years.In January 2006, after falling on difficult times, it became a subsidiary of the Takamatsu ...

Cosmo Oil Company, Limited (コスモ石油株式会社, Kosumo Sekiyu kabushiki gaisha) is a Japanese petrochemical company. It is Japan's third-biggest refiner by sales after JX Holdings and Idemitsu Kosan. History. Cosmo traces its corporate roots to Maruzen Petroleum ...