It has been said that Koreyasu (prince of the sixth Shogun Imperial Prince Munetaka, who himself was Imperial Prince of Emperor Gosaga) had to be demoted from nobility to subject at the behest of the bakufu and, not at the wish of the Imperial family side.
後嵯峨天皇の皇子・6代将軍宗尊親王の王子である惟康が臣籍降下せねばならぬ理由は朝廷側にはなく幕府側の要請によるとの説もある。