Zaibatsu

He wondered briefly what it would be like, working all your life for one zaibatsu. Company housing, company hymn, company funeral.

At other points, the film suggests the motive is financial, depicting the Kobayashi clan as staging an industrial coup of sorts, like a quirky Andersonian take on the zaibatsu (a term for the family-controlled business monopolies that dominated Japan until the end of World War II).

Near-synonyms: megacorporation, supercorporation