The First National Bank (Daiichi Bank) -> the Teikoku Bank (the corporate entity was disappeared once at this point) -> the Daiichi Bank (divided by establishing new corporate entity) -> the Dai-Ichi Kangyo Bank -> the Mizuho bank (the corporate entity was disappeared when the bank became the Dai-Ichi Kangyo Bank.)
第一国立銀行（第一銀行）→帝国銀行（この時点で一旦法人格消滅）→第一銀行（新たな法人格を立ち上げて分割）→第一勧業銀行→みずほ銀行（第一勧業銀行となった時点で法人格は消滅）