The four major zaibatsu, together with the 11 zaibatsu that were ordered dismantled by the General Headquarters of the Allied Powers (GHQ) are referred to as the 15 major zaibatsu.
四大財閥に、連合国軍最高司令官総司令部による財閥解体指令を受けた11財閥を加えたものを、特に十五大財閥と呼ぶ。