51 members of 11 Miyake left in accordance with the current Imperial Family Law, Clause 11, 'Due to Imperial member's will or due to the decision of the Imperial Household Council', or Clause 14 of the same law, 'Due to Imperial member's will' or Clause 13, 'the Imperial Princes or their Princesses or other lineal descendants and their Empresses should leave their position as Imperial members, excluding female members who married into other Imperial Families or their lineal descendants.'
11宮家51名の皇籍離脱は、法形式上は現行の皇室典範11条「その意思に基き、皇室会議の議により」若しくは同14条「その意思により」又は同13条「皇族の身分を離れる親王又は王の妃並びに直系卑属及びその妃は、他の皇族と婚姻した女子及びその直系卑属を除き、同時に皇族の身分を離れる」によってそれぞれ行なわれた。