Zaibatsu

Zaibatsu is a word meaning "money clique" or "conglomerate" in the
Japanese language. It was used in the 19th century and the first half of the
20th century to refer to large family-controlled banking and industrial combines.

The term gained popularity in the United States in the 1980s to refer to any
large corporation, in large part from its usage in a few cyberpunk stories,
but it is not used in Japan for anything other than historical discussions.