All three predecessors were major financial institutions in their own right and had served as cornerstones of major zaibatsu (prewar era) and keiretsu (postwar era).
Semua tiga pendahulunya adalah lembaga keuangan besar di kanan mereka sendiri dan telah menjabat sebagai landasan zaibatsu (era sebelum perang) dan keiretsu (era sesudah perang) utama.