Emperor Shoko was not well and had been in critical condition since 1422, and because he did not have any children, the Retired Emperor Gokomatsu felt the need to restrain the progression of the Daikaku-ji Imperial line.
先代の称光天皇は1422年以降、幾度か危篤状態に陥るなど病弱で皇子が無く、後小松上皇は大覚寺統の動きを牽制する必要があった。