Kongō Gumi is a Japanese construction company founded in 578 AD, making it one of the oldest continuously operating businesses in the world. Established by Shigemitsu Kongo, the company initially focused on building Buddhist temples, reflecting the strong influence of Buddhism in Japan during that period. Over the centuries, Kongō Gumi has constructed many notable structures, including the famous Osaka Castle. Despite facing challenges in the modern era, such as economic downturns, the company has adapted by diversifying its services and continues to operate today, maintaining its rich heritage in traditional craftsmanship.