There was a theory that the Cloistered Emperor Reigen was against establishing a new Miyake, and he was not in favor of the Miyake when it was requested while he was in power as an Emperor, he was frustrated that it had been approved at the request of Emperor Higashiyama, while he supported the shogunate government and not when he was in power.
霊元法皇が新宮家創設に反対したとする説があるが、法皇の天皇在位中にも新宮家創設を要望して拒否された経緯があり、自分の代には認めず親幕府派の東山天皇の要望によって認めたことへの不満があったとされている。