For Kaneie, existence of Masanobu was apparently an obstacle to gaining absolute power, but different from Michizane SUGAWARA in the Shotai Incident, MINAMOTO no Takaaki in the Anna Incident and return of MINAMOTO no Kaneaki to a member of the Imperial Family, no pretext to eliminate Masanobu could be found (As Michizane and Takaaki had matrimonial relation with influential members of the Imperial Family and Kaneaki was originally an imperial prince, a pretext for eliminating them could be found easily, but in Masanobu's case, neither of them existed).
兼家が摂政として全権を振るうには雅信の存在は明らかに障害ではあったが、昌泰の変の菅原道真や安和の変の源高明、源兼明の皇族復帰の時と違って、これを排除するだけの名目を見つけることが出来なかった（道真や高明は有力皇族との婚姻があり、兼明は元々親王身分であったために排除の理由は簡単に見つけられたが、雅信の場合にはそのいずれでもなかった）。