Industrial Bank of Japan
Mizuho predecessors, the Dai-Ichi Kangyo Bank (DKB), the Fuji Bank (Fuji) and the Industrial Bank of Japan (IBJ), had great control over many Japanese companies through keiretsu system. The three banks led the DKB Group, Fuyo Group and the IBJ Group respectively. The Fuyo Group traces its history as far back as the old Yasuda zaibatsu. Even now, seven out of ten companies listed on the Tokyo Stock Exchange have dealings with Mizuho.