Mitsubishi is not a single company, but a loose federation of autonomous corporate giants.
Founded in 1870 as a shipping firm, Mitsubishi evolved from a unified conglomerate into a decentralized network of independent entities. Today, these companies share a brand and a history, but they operate without a central parent, linked primarily by informal social ties and a shared legacy of industrial modernization.
The origins of Mitsubishi lie in the 1870 shipping business established by Iwasaki Yatarō. By the early 20th century, it had grown into a massive zaibatsu—a unified, family-controlled conglomerate that dominated Japanese industry. This entity expanded aggressively into coal mining, shipbuilding, and aircraft manufacturing, playing a central role in Japan's rapid economic development. However, the end of the Second World War brought a forced dissolution by Allied occupation authorities, who sought to dismantle the economic power structures that had supported the war effort.
Following the war, the unified structure was shattered, and major components like Mitsubishi Heavy Industries were split apart. Yet, the group proved resilient. In the 1950s, the companies began to reintegrate, not as a single hierarchy, but as a collection of autonomous firms. This process was spurred by external threats, such as a 1952 greenmail attempt against Yowa Real Estate, which forced the various Mitsubishi entities to coordinate their defenses. This led to the formation of the Friday Conference, a monthly executive meeting designed to foster cooperation.
Today, the Mitsubishi Group consists of about 40 independent companies, including MUFG, Mitsubishi Corporation, and Mitsubishi Heavy Industries. While they maintain cross-shareholdings, they lack a controlling parent. The Friday Conference remains a symbol of this unique structure, though it is officially a social gathering rather than a strategic board. Despite their independence, the group remains a titan of the Japanese economy, with a 2020 estimate suggesting they account for nearly 8% of all revenue generated by publicly traded firms in Japan, holding assets worth 433 trillion yen.
Source: Mitsubishi
