Zaibatsu

Zaibatsu refers to a corporation that is a massive conglomerate, holding monopolistic or near-monopolistic control over multiple markets. Zaibatsus are so powerful that they can ignore the law, possess their own heavily armed (often military-sized) private armies, be the operator of a privatized police force, hold "sovereign" territory, and even act as outright governments. They often exercise a large degree of control over their employees, taking the idea of "corporate culture" to an extreme.