It was said that Ryoshun asked Mitsukane ASHIKAGA (the first son of Ujimitsu ASHIKAGA) to join the war, so Yoshimitsu suspected Ryoshun's involvement in this incident, then a year after suppression, Norisada UESUGI, Kanto Kanrei (A shogunal deputy for the Kanto region) was ordered to track down and kill Ryoshun.
了俊は鎌倉公方の足利満兼（足利氏満の長男）に乱に呼応するように呼びかけたとも言われ、義満に関与を疑われ、平定後の翌年には鎌倉公方を補佐する関東管領の上杉憲定に対して貞世追討令が出される。