After the birth of Imperial Princess Aiko, revision of the Imｐerial House Act has begun to be discussed in order to maintain stable succession to the Imperial Throne because, even though the Imperial House Act approves succession to the Imperial Throne only by a male member of the Imperial family, young male members of the Imperial family are decidedly in short supply.
皇室典範の規定では男性皇族にしか皇位継承を認めていないにもかかわらず、若い男性皇族が決定的に不足していることから、愛子内親王誕生後、安定した皇位継承を維持するために、皇室典範の改正が議論されるようになった。